Mathematics Middle School

Can someone please help me answer these questions in scientific notation?)
1. (5.2 x 10⁻³) - (2.58 x 10⁻³)
2 (3.6 x 10⁻²) + (4.0 x 10⁻¹)
3. (8.32 x 10⁻³) - (5.9 x 10⁻⁴)
4. (6.03 x 10⁻²) - (3.8 x 10⁻³)

Answers

Answer 1
1. 0.00262 or 131/50000
2. 0.436 or 109/250
3. 0.00773 or 773/100000
4. 0.0565 or 113/2000

Related Questions

how much money must you deposit in a simple interest account to earn $500 in interest in 5 years at 4% annual interest?

Answers

500*5*0.04=100
Let me know if I wrong

The $2500 money must you deposit in a simple interest account to earn $500 in interest in 5 years at 4% annual interest.

What is simple interest?

It is defined as the interest based on the principal amount, it does not include the compounded amount. The interest calculates on the initial amount or borrowed amount.

It is given that:

simple interest account to earn $500 in interest in 5 years at 4% annual interest

As we know the simple interest formula is:

I = Prt

Here

I = $500

t = 5 years

r = 4% = 0.04

500 = P(0.04)(5)

P = 500/0.2

The money that must be deposited in a simple interest account to earn $500 is:

P = $2500

Thus, the $2500 money must you deposit in a simple interest account to earn $500 in interest in 5 years at 4% annual interest.

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Mr. and Mrs. Delgado each own an equal number of shares of a stock.Mr. Delgado sells one-third of his shares for $2700. What was the value of Mr. and Mrs.Gelgados stock before the sale?

Answers

3x2700=Just Mr. Delgado's shares' value= $8100

Since they own an equal number of shares, their total value of stock before the sale is two times what each of them has separately.

$8100 x 2=value of their stock= $16200

Explain how using basic fact can help find 10x20x30x40 mentally

Answers

2x3x4 = 24
Add the 4 zeros to the end
240,000
well just take the 0 and start with 1 × 2 = 2×3=6×4=240000 than add the 0 that u took out

Jinni opened a bank account. She deposited $87.60 into her account every month for 10 months. She used $25.60 every month to pay for music classes. After 10 months, she used 1 over 4 of the total money left in her account to go to a summer camp for musicians. What is the total amount of money Jinni spent to go to the summer camp? $64.00 $88.00 $155.00 $620.00.Please help I am on a time limit!!!!

Answers

You want to multiply 87.60 and 25.60 by 10. 87.60x10=876. 25.60x10=256.876-256=620. Then you will take 1/4 of 620 to get the answer 155 is what she paid for lessons.

Answer:

$155.00

Step-by-step explanation:

Jinni deposited $87.60 every month for 10 months, this represents a total of

[tex]\$87.60(10)=\$876[/tex]

But, she used $25.60 every month to pay for music classes, the total money spent is

[tex]\$25.60(10)=\$256[/tex]

So, she has in her bank account

[tex]\$876 - \$256 = \$620[/tex]

Then, she uses 1/4 of the total money left ($620) to go to a summer camp, which is

[tex]\frac{1}{4}(\$620)=\$155[/tex]

Therefore, she spent $155 to go to the summer camp. So, the right answer is the third option.

draw a rectangle on the grid below with an area of 1575 square units and a side of 45 units

Answers

1575/45 = 35
35 x 45 =1575

Some students reported how many textbooks they have. The dot plot shows the data collected: A dot plot is titled Students Textbooks and labeled Number of Textbooks. The values on the horizontal line are 2, 3, 4, 5, and 6. There is 1 dot above 2, 2 dots above 3, 4 dots above 4, 5 dots above 5, and 4 dots above 6. What do the dots above the number 6 indicate? There are exactly 6 students with 4 textbooks. There are exactly 4 students with 6 textbooks. There are exactly 6 students with less than 4 textbooks. There are exactly 4 students with less than 6 textbooks.

Answers

There are 6 students with 4 textbooks. The horizontal line represents the number of of students and the vertical line represents the amount of textbooks 

Answer:

B

Step-by-step explanation:

The distance between bases on a baseball diamond (a perfect square) is 90 feet and the pitchers mound is one-half the distance between home and second base. If Burt Hooton throws a slider at 87 mi/hr, how many seconds will it take for the ball to reach the plate?

Answer in units of s.

Please help me! Thank you!

Answers

First you have to use right triangles to find out how far away from the plate, then just use multiplication to find the final answer.

what is the product? (3a^2b^7)(5a^3b^8)

Answers

15a^5 b^15 Is The Answer 

help me with question 2 plss

Answers

i cannot do this because it wont let me look at the attachment i am sorry
[tex]\frac{p^{3 \cdot 4}}{q^4} \times \frac{9q^{4\cdot2}}{p^{3\cdot2}} = \frac{p^{12}}{q^4} \times \frac{9q^{8}}{p^{6}} = {p^{12-6}} \times 9q^{8-4}}} = 9p^6q^4[/tex]

what's 867,000→ to the nearest ten

Answers

867000 to the nearest ten is 867000 is your answer

hope this helps

bananas are $0.59/pound, how much will 25 bananas cost?

Answers

The answer would be $14.75. You would have to do .59 times 25 bananas and you would would get $14.75.
25 lbs at 0.59 per lb = 25 * 0.59 = $ 14.75 <==

Venus is about 10^8 kilometers from the Sun. Saturn is about 10^9 kilometers from the Sun. About how many times farther from the Sun is Saturn than Venus?

Answers

Alright, since we need to figure out how many times the distance from Venus is compared to the distance from Saturn, we use division and put the distance from Saturn at the top, getting 10^9/10^8. While dividing exponents, you can simply subtract them, so 9-8=1 and we end up with 10^1=10

Jim makes the following conjecture: other than 1, there are no numbers less than 100 that are perfect squares and perfect cubes. what is a counterexample that proves his conjecture false?

Answers

The number 64 is a counterexample to Jim's conjecture because it is the square of 8 and the cube of 4. A fast way to solve this problem is to list out the perfect cubes that are less than 100 and check if any of them are also perfect squares. A perfect square is a number which can be written as another number multiplied by itself, and a perfect cube is one which can be written as a number multiplied by itself twice. The perfect cubes less than 100 are as follows: 1*1*1 = 1 2*2*2 = 8 3*3*3 = 27 4*4*4 = 64 Now we can calculate perfect squares until we find one in this list 1*1 = 1 2*2 = 4 3*3 = 9 4*4 = 16 5*5 = 25 6*6 = 36 7*7 = 49 8*8 = 64 We see that 64 is in the list of perfect squares and perfect cubes, so this is a counterexample to Jim's conjecture.

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the distance in 4 h. Car A traveled 22 mph faster than Car B. How fast did Car A travel? (The formula R⋅T=D , where R is the rate of speed, T is the time, and D is the distance can be used.) Enter your answer in the box.

Answers

Let the distance be D miles
Car A:-  D = 2.4R   and for Car B:-   D = 4(R- 22)

therefore 2.4R = 4(R-22)

4R - 88 = 2.4R
1.6R = 88
R =  55mph  Answer

Rate of speed is rate of change of distance with respect to time, If Car A traveled the distance in 2.4 h, and Car B traveled the distance in 4 h.

Car A traveled 22 mph faster than Car B. 55mph fast car A travel.

What is Rate of speed?

Rate of speed is rate of change of distance with respect to time.

Let the distance be D miles

Car A:-  D = 2.4R   and

for Car B:-   D = 4(R- 22)

therefore 2.4R = 4(R-22)

4R - 88 = 2.4R

4R-2.4R=88

1.6R = 88

R =  55mph  Answer

Therefore car A travels 55mph faster than car B.

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Write a story that could describe the expression:

75x - 20

Answers

If John wants to buy 75 packs of gum but doesn't know how much pieces of gum are in each pack as well as that he has to give 20 pieces to his friend Dan, how many pieces of gum does he have left? 

Since he adds x pieces of gum for each pack, his total gum is 75x. Next, since he gives 20 pieces to his friend, we have to subtract 20 from that
If I make 75 dollars in a day and then use 20 dollars for gas then how much money will I have left over

Which of the following would be equivalent to 11 to the 8th power over 11 to the 3rd power?

A)11 to the 7th power over 11 to the 7th power
B)11 ⋅ 114
11 to the 0 power over 11 to the 5th power
110

Answers

none of the above. 11^8/11^3 is 11^5 since you will just subtract exponents. The numerical value is 161051
although you should have an option that either is 11^5 or equals 11^5 like 11^15/11^10 for example
the third answer is almost correct, but it would have to be 11^5/11^0

Answer:

[tex]11 .11^4[/tex]

Step-by-step explanation:

Given phrase,

11 to the 8th power over 11 to the 3rd power

[tex]\implies \frac{11^8}{11^3}[/tex]

[tex]=11^{8-3}[/tex]  [tex](\because \frac{a^m}{a^n}=a^{m-n})[/tex]

[tex]=11^5[/tex]

Since,

[tex]11.11^4[/tex]

[tex]=11^{1+4}[/tex]

[tex]=11^5[/tex]

Hence, the equivalent expression to 11 to the 8th power over 11 to the 3rd power is,

[tex]11.11^4[/tex]

What is the best estimate for the product of 289 and 7

Answers

product means multiply
Estimate means you have to round to the nearest 10, 100, ect...
300*10= 3000
The exact value though is 2023

289 -> 290

7 -> 10

290 x 10

= 2900

use the model to solve for x

Answers

3x+1 = 2x-5

3x = 2x-6

x = -6

I need a quick good conclusion thank you

Answers

You'll notice that 36's prime factors had 2 even, and none other had an even number of even prime factors. Therefore, if you have an even number of even prime factors, your square root will be rational given the data

Is 16.45 greater, less than or equal to 16.454

Answers

16.45 is less than 16.454
16.45 is less than 16.454 because 16.454 had 0.004 more than 16.45

The temperature in Jonestown and Cooperville was the same at 1:00. By 2:00, the temperature in Jonestown dropped 10 degrees, and the temperature in cooperville dropped 6 degrees. By 3:00 the temperature in Jonestown dropped 8 more degrees, and the temperature in coopervi dropped 2 more degrees.

Answers

Final answer:

The subject of this question is Physics as it involves the concept of temperature and the change in temperature over time.

Explanation:

The subject of this question is Physics as it involves the concept of temperature and the change in temperature over time.

Step 1: At 1:00, the temperature in Jonestown and Cooperville was the same.

Step 2: By 2:00, the temperature in Jonestown dropped 10 degrees and the temperature in Cooperville dropped 6 degrees.

Step 3: By 3:00, the temperature in Jonestown dropped an additional 8 degrees and the temperature in Cooperville dropped an additional 2 degrees.

Therefore, the subject of this question is Physics and the grade is High School.

A 20-minute TV program consists of two commercials, each 1 3/4 minutes long, and three equal‐length entertainment segments. How long is each entertainment segment?

Answers

Final answer:

To find the length of each of the three entertainment segments in a 20-minute TV program with commercials, we subtract the total time of the commercials from the total time of the program and divide the remaining time by the number of segments. This gives a length of 5.5 minutes for each segment.

Explanation:

To determine the length of each entertainment segment in this 20-minute TV program, we first need to subtract the total length of the commercials from the overall program length. The two commercials, each 1 3/4 minutes long, add up to 3 1/2 minutes.

20 minutes (total program length) - 3.5 minutes (total commercial time) = 16.5 minutes left for the entertainment segments.

As there are three equal‐length entertainment segments, we simply divide the remaining time by the number of segments:

16.5 minutes / 3 = 5.5 minutes.

Therefore, each entertainment segment is 5.5 minutes long.

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Final answer:

Each entertainment segment is 5.5 minutes long.

Explanation:

To find the length of each entertainment segment, we need to subtract the total time of the commercials from the total duration of the TV program.

The total time of the commercials is given as 1 3/4 minutes each, which is equivalent to 7/4 minutes each.

So, the total time of the commercials is 2 * 7/4 = 14/4 = 3.5 minutes.

Since we know that the TV program is 20 minutes long, the total time of the entertainment segments can be found by subtracting the time of the commercials from the total duration: 20 - 3.5 = 16.5 minutes.

Since there are three equal-length entertainment segments, we can divide the total time of the entertainment segments by 3: 16.5 / 3 = 5.5 minutes.

Therefore, each entertainment segment is 5.5 minutes long.

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PLEASE HELP WITH MY MATH!

What is the value of the expression? −2^6 − (6)^2

Enter your answer in the box.

Answers

(-2)^6 - 6^2
= 64 - 36
= 28
-2^6-(6)^2= -100. Hope this helps have a great day. :)

0.9c+0.5c=7 answer for c

Answers

0.9c+0.5c=1.4c
1.4c=7
c=7/1.4
c=5

C=5.
you’re going to add 0.9+0.5c
1.4c is going to be your answer so then you’re going to equal 1.4c=7.
then you divide 1.4 on both sides.
1.4c divided by 7 is 5.

A company has the pay scales below , with the percent of employees receiving that pay listed. Find the best value to represent an average salary at this company. ( round to the nearest dollar ) Job Salary Percent of Employees Entry $30,000 60% Expert $40,000 38% CEO $125,000 2%

Answers

The given table is the following:

  Job          Salary   % of Employees
--------    ------------   ----------------------
Entry      $30,000      60%
Expert    $40,000      38%
CEO     $125,000        2%

Let n = total number of employees.

Entry:
Number  = 0.6n
Pay total = 0.6n*(30,000) = $18,000n

Expert:
Number = 0.38n
Pay total = 0.38n*(40,000) = $15,200n

CEO:
Number = 0.02n
Pay total = 0.02n*(125,000) = $2,500n

Total pay = 18,000n + 15,200n + 2,500n = $35,700n
Average salary = 35,700/n = $35,700

Answer: $35,700

Answer choices:

A and T
WCR and TRA
<-----> WC <----> CR
<-----> WC <----> WT

Answers

A and T are points. On their own, they cannot define a line. So we can rule out choice A

WCR and TRA are angles. For any triple the points do not fall on the same straight line. So we cannot define any lines here. This crosses off choice B

Choice C is the answer because WC does define a line. We only need two points to form a line. Similarly CR does the same job. We draw a line marker with two arrows at each end to be placed over the letters to indicate "line". 

Choice D is similar to choice D; however, it is not the answer because WT is the same line as WC. In other words, WC = WT. We haven't named a new line at all. We're simply repeating ourselves. 

The unit rate for $18 for 24 pounds

Answers

$0.75 a pound. This can be written as 3/4, as well.

Final answer:

To find the unit rate of $18 for 24 pounds, you divide the total cost by the number of pounds, resulting in a unit rate of $0.75 per pound.

Explanation:

The student is asking how to calculate the unit rate of a product that costs $18 for 24 pounds. To find the unit rate, you divide the total cost by the total number of units (in this case, pounds). So, the calculation for the unit rate in this question would be:

$18 ÷ 24 pounds = $0.75 per pound

Thus, the unit rate is $0.75 per pound. This means for every pound of the product, you pay $0.75.

Write in the form y=mx+b, the equation of the line that has:

A) a slope of 6 and passes through (1,5)

B) a slope of 5/6 and passes through (-12, 3)

Answers

5= 6+b
-1=b
Y=6x-1
3=-10+b
13=b
Y=5/6x+13

Decrease £248 by 30%

Answers

Thank you for your question!

248 * 0.30 = 74.4
248 - 74.4 = 173.6

Hope this helps!
Okay this equation really says is what is 30% of 248.

So, lets convert 30% to a fraction, 3/10 which is easier to work with.

All you have to do now is get out a calculator and do 248 *3/10 (or .3) and get 74.4

So subtract 74.4 and get

173.6

again I think I am right but I just want to check myself

Answers

Yes that is correct the first bubble is what you should pick
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