Dr. McDonald thinks that his group of earth science students is particularly special (in a good way), and he is interested in knowing if their class average falls within the boundaries of the average score for the larger group of students who have taken earth science over the past 20 years. Because he has kept good records, he knows the means and standard deviations for both his group of 36 students and the larger group of 1,000 past enrollees. Here are the data he has, and the values for which you will need to compute the z-test

Answers

Answer 1
I don't know what witch is this

Related Questions

If a = 3 and b = 2, what is the value of the expression 11 + a - b ?

Answers

Substitute the values of a and b into the expression:
11 + 3 - 2
Add first because of order of operations (perform addition and subtraction in the order of occurrence from left to right):
14 - 2
Subtract (same justification as above just with subtraction instead):
12
Hope this helps!

Which graph represents the function f(x) = −|x − 2| − 1?

Answers

the 3rd one in the picture

Answer:

option 3

Step-by-step explanation:

[tex]f(x) = -|x -2| - 1[/tex]

The given equation is in the form of [tex]f(x) = a|x -h|+k[/tex]

where (h,k) is the vertex .

[tex]f(x) = -|x -2| - 1[/tex]

h=2 and k=-1 . the value of a=-1

Since the value of 'a' is negative so the graph will be upside down

option 3 is upside down and vertex at (2,-1)

So option 3 graph represents the function

Gary read 34 pages of a 340 pages book what percentage did he read

Answers

Gary read 10% of the book. To solve this, I turned the problem to a fraction 34/340 (34 out of 340 pages read) and simplified it to 10/100 so I can convert it to the percent, 10%.

As per linear equation, Gary read 10% of the book.

What is a linear equation?

"A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation."

Gary read 34 pages of a 340 pages book.

Therefore, the percentage of the book he read is

= (34/340) × 100%

= 10%

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mr smith waters one one of his plants every 10 days and another plant every 14 days. If he water both days today when is the next time both plants will be watered on the same day?.

Answers

it will be after 70 days

Answer:

after 70 days.

Step-by-step explanation:

Mr. Smith waters one of his plants every 10 days and another plant ever 14 days.

he waters both plants today we have to find the next time both plants will be watered on the same day.

So we will take LCM of these numbers.

LCM of 10 , 14

= 2 × 5 × 7

= 70

The next time both plants will be watered on the same day after 70 days.

How do I do this without a graph to plot points on

Answers

I'm guessing you should write it in the Slope Intercept Formula, which is y = mx + b

For example, #6 would be y = 5x - 1

48 pounds of sand are are used to fill 12 bags, miranda uses the five step problem-solving plan. after completing the solving step how many pounds of sand should she find each bag will hold

Answers

4 pounds of sand each bag should hold
The answer is, each bag will hold 4 pounds of sand.

Which expression is equivalent to 3 square root 216x27 ?

6x3
6x9
72x3
72x9

Answers

[tex]\sqrt[3]{216\times27}\\\\\text{Use:}\ \sqrt[n]{a\cdot b}=\sqrt[n]a\cdot\sqrt[n]b\\\\\sqrt[3]{216\times27}=\sqrt[3]{216}\cdot\sqrt[3]{27}=6\cdot3=18\\\\.........................................................\\\\\sqrt[3]{216}=6\ \text{because}\ 6^3=216\\\\\sqrt[3]{27}=3\ \text{because}\ 3^3=27[/tex]

The answer to your problem would be answer B. 6x^9. It is the only answer equivalent to the 3 square root 216x27.


Hope this helps. :3

Which quadrilaterals always have four right angles?  
Choose all answers that are correct.  

A. square
 
B. rhombus
 
C. trapezoid
 
D. rectangle

Answers

Square and rectangle because the other ones have 4 equal sides too, but they're not RIGHT angles.
Square and rectangle

Kay buys 12 pounds of apples.Each pound costs $20 bills. How much will change should she receive

Answers

You haven't given us enough information.  Does each apple cost $20? If so, how much does she give the apple farmer
20*12=240. You don't give me the change she gave to the cashier.

A train consisting of 50 cars and 1 locomotive weighs a total of 4725 tons. the locomotive weighs 125 tons all the cars have the same weight. Find the weight of 1 car

Answers

92 tons= the weight of one car!!!!
Do you need to show work?


50c+125=4725
-125. -125
4600 divided by 50=92 tons
C=92 ton

Julia left school and travel toward the train station. One hour later Carlos left traveling at 30 mph in an effort to catch up to Julia. After traveling for two hours Carlos finally caught up. Find Julie is average speed

Answers

speed = distance/time

distance = speed * time

Carlos traveled for 2 hours.
Julia traveled for 1 more hour, or 3 hours

Carlos:
time = 2
distance = d
speed = 30 mph

distance = speed * time
d = 30 * 2
d = 60 miles

They both traveled 60 miles.

Julia:
time = 3
distance = 60 miles
speed = s

speed = distance/time = (60 miles)/(3 hours) = 20 mph

Julia's speed is 20 mph.

How much is 24 ounces of spread if it is $6.40 per pound?

Answers

Since a ounce = pound is 16=1 so convert 24 ounces into pounds which is 1.5 pounds so multiply 6×4 by 1×5 and get $9.6 dollars for 24 ounces of the spread.
A pound = 16oz
Half a pound = 8oz

16 + 8 = 24
|| || ||
1lb 1/2lb 1 1/2 lbs


6.40/2 = 3.20
6.40 + 3.20 = 9.60

Your answer is 9.60

A pet shop uses 43 pounds of food each day. How many pounds are used in 365 days?

Answers

You know that 43 pounds are used each day, and they say 365 days, so what do you do?





































You multiply
43 lbs. x 365 days=15,695 lbs.

256is what percent of 400=

Answers

So first change this to a fraction.

256/400

And then just divide.

256/400 = 0.64

And then change that to a percent.

64%
The answer is that 256 is 64% of 400.

the attendance at two baseball games on successive nights was 66,000 the attendance on Thursdays game was 6,000 more than 2/3 of the attendance at Friday nights game

Answers

Fridays game = x

 Thursdays game = 2/3x +6000

 x + 2/3x +6000 = 66000

x +2/3x = 5/3x

5/3x + 6000 = 66000

5/3x = 60000

x = 60000 / 5/3 = 36000

 Friday night = 36000

 Thursday night = 30000

Marty has a fenced yard in the shape of a rectangle. It's area is 635.4 square feet. The width of the yard is 18 feet. What is the length of the fence?

Answers

Area=length*width

635.4=18*L
35.3=L

So the answer is 35.3
Final answer:

The length of the rectangular yard, given an area of 635.4 square feet and a width of 18 feet, can be calculated using the formula for the area of a rectangle. Substituting the given values into the formula, we find that the length is approximately 35.3 feet.

Explanation:

The question is about finding the length of a rectangular yard given its area and width. Recognizing that the formula for the area of a rectangle is Area = Length x Width, we can easily find the length of the yard by rearranging the formula.

To find the length of a rectangle when you know the area and width, use the rearranged area formula: Length = Area ÷ Width.

Given the values from the problem: Area = 635.4 sq ft and Width = 18 ft, we substitute them into the formula: Length = 635.4 ÷ 18. This results in a length of approximately 35.3 feet.

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Carla’s credit card statement showed that she owed $350. She made a payment of $200, then she charged $23 for gasoline. She returned a sweater she had charged earlier for a refund of $35. Then she charged $15 at the bookstore. How much does she still owe?

Answers

350
-200
____
150
+23
____
173
- 35
____
138
+ 15
____
153
She still owes $153


Samuel recorded the number of different types of pets his friends have in the table shown below:


Cats 5
Dogs 3
Rabbits 1
Guinea Pigs 3


Which of the following plots represents the data in the table?
A line with 4 tick marks labeled Cat, Dog, Rabbit, and Guinea Pig. Cat has 5 crosses, Dog has 3 crosses, Rabbit has 5 crosses, and Guinea Pig has 3 crosses. The line is labeled Number of Pets, and title of graph is Pet Owners.
A line with 4 tick marks labeled Cat, Dog, Rabbit, and Guinea Pig. Cat has 1 cross, Dog has 3 crosses, Rabbit has 1 cross, and Guinea Pig has 3 crosses. The line is labeled Number of Pets, and title of graph is Pet Owners.
A line with 4 tick marks labeled Cat, Dog, Rabbit, and Guinea Pig. Cat has 5 crosses, Dog has 3 crosses, Rabbit has 1 cross, and Guinea Pig has 3 crosses. The line is labeled Number of Pets, and title of graph is Pet Owners.
A line with 4 tick marks labeled Cat, Dog, Rabbit, and Guinea Pig. Cat has 4 crosses, Dog has 2 crosses, Rabbit has 0 cross, and Guinea Pig has 2 crosses. The line is labeled Number of Pets, and title of graph is Pet Owners.

Answers

It’s the third option pretty sure

Answer:

option: C is correct.

Step-by-step explanation:

We are given a information as:

Samuel recorded the number of different types of pets his friends have in the table shown below:

Cats 5

Dogs 3

Rabbits 1

Guinea Pigs 3

The plot based on this information will be:

A line with 4 tick marks labeled Cat, Dog, Rabbit, and Guinea Pig. Cat has 5 crosses ( since it is observed that there were 5 cats) , Dog has 3 crosses, Rabbit has 1 cross, and Guinea Pig has 3 crosses. The line is labeled Number of Pets, and title of graph is Pet Owners.

Hence, option: C is correct.

evaluate 10 + 8÷4 - 12

Answers

0... I think

Hope this helped!
The answer is 0

8/4 =2
10+2-12
12-12
0

Consider the graph of the equation y = 5. Which statements are true? Check all that apply. The graph of y = 5 is a vertical line. The graph of y = 5 is a horizontal line. The graph of y = 5 is neither a vertical line nor a horizontal line. The point (5, 3) lies on the line. The point (–4, 5) lies on the line.

Answers

Hello!

y = 5 is a horizontal line whose y-values are all 5. Given this, the true statements are -

- The graph of y = 5 is a horizontal line
- The point (-4, 5) lies on the line

I hope this helps you!

Answer:

B and E

Step-by-step explanation:

Got these right on Ed

what is a solution to (x-2)(x+10)=13?
a: x=3
b: x=8
c: x=10
d: x=11

Answers

(x-2)(x+10)=13

x^2 + 10x - 2x - 20 = 13

x^2 + 8x - 20 - 13 = 0

x ^2 + 8x - 33 = 0

(x + 11) (x - 3) = 0

x + 11 = 0

x = -11

x - 3 = 0

x = 3

The answer is clearly x = 3.

Choice a.
Best answer would be A

you can buy 5 t-shirts at baxter's for the same price that you can buy 4 t-shirts at Bixby's

Answers

Ok
What is the question

What is 231 divided by 42

Answers

5.5 is the answer for the problem
5.5 is the correct answer

the sum of twice a number and 9 is 43

Answers

2x + 9 = 43 This is the equation.
2x = 34 Subtract 9 from both sides.
x = 17 Divide both sides by 2.

Answer:x=17

Step-by-step explanation:

Eric had 2 liters of water. He gave 0.42 liter to his friend and then drank 0.32 liter. How much water does he have left? Helpppp

Answers

2-0.42-0.32=1.26 L
 
     ↓       ↓
 ↓  friend  him
original

Answer:

1.26

Step-by-step explanation:

sence he had 0.42 and 0.32 pluss 2 you would get the answer

find the percent increase for 13 friends to 14 friends round to nearest percent if you can

Answers

From 13 to 14 # is increased by 1

14-14 = 1/13 *100% That equals 7.69%

Your answer is 7.69%

Final answer:

The percent increase from 13 to 14 friends is calculated as [(14 - 13) / 13] × 100, which gives a result of approximately 7.7%. After rounding to the nearest percent, the increase is 8%.

Explanation:

To find the percent increase from 13 friends to 14 friends, we use the formula for percentage change, which is:

Percentage Change = [(New Value - Original Value) / Original Value] × 100

In this case, our original value is 13 (the number of friends at the start) and our new value is 14 (the number of friends after the increase). So, we plug these numbers into our formula:

Percentage Change = [(14 - 13) / 13] × 100 = [1 / 13] × 100

Now, we calculate the fraction and then multiply by 100:

Percentage Change = (0.07692307692) × 100 ≈ 7.7%

When rounded to the nearest percent, the percent increase is approximately 8%.

Use long division to convert the rational number 5/7 to its equivalent decimal form. In your final answer, include all of your work.

Answers

just show you the first significant figures.


7 /0.71428______
/50
49
........................
10
7
..........
30
28
….........
20
14
………………
60
56
...................
4

estimate 102.3 divided by 4.7

Answers

Answer:

20

Explanation:

To estimate, we round.  102.3 rounds to 100 and 4.7 rounds to 5; this means we divide 100/5, which is 20.

Answer:

The estimate result of 102.3 divided by 4.7 is 20.

Step-by-step explanation:

Given : 102.3 divided by 4.7

We have to estimate 102.3 divided by 4.7

Since, estimation is the roughly calculation and is usually involves rounding to the nearest values so that they are easy to cancel out.

Since, we have to divide,

102.3 divided by 4.7

Rounding 102.7 to nearest tens place , we get, 102. 7 = 100

And Rounding 4.7 to nearest  ones place, we get, 4.7 = 5

Thus, when divide 100 by 5 , we get 20.

Thus,  102.3 divided by 4.7 ≈ 20

Thus, The estimate result of 102.3 divided by 4.7 is 20.

Pattern x: Starts at 0. Rule: Add 3.

Pattern y: Starts at 0. Rule: Add 6.

The values of Pattern x and Pattern y are graphed on a coordinate graph. Some of the ordered pairs for this pattern are (0, 0) , (3, 6) , (6, 12) , and (9, 18) .

Which ordered pair also belongs to this pattern?

Answers

I think (0,0) is the only one that starts at 0 for both x and y and stay the same if the add the 3 to x and 6 to y.

1.75 rounded to the nearest whole number

Answers

Numbers 0, 1, 2, 3, and 4 are rounded down.
Numbers 5, 6, 7, 8, and 9 are rounded up.

Since we're rounding to the nearest whole number, don't even look at the hundreths place. All you need is the tenths place.

The number in the tenths place is 7, so you round up.

1.75 rounded to the nearest whole number is 2.

Hope this helps!
Your song is "Sincerely Me"

The rounded number is given by A = 2

What is rounding up numbers?

There are basically two rules while rounding up numbers

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down and if the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up.

Non-zero digits are always significant

Zeros between non-zero digits are always significant

Leading zeros are never significant

Trailing zeros are only significant if the number contains a decimal point

Given data ,

Let the rounded number be represented as A

Let the number be represented as n

Now , the value of n = 1.75

And , when you round to the nearest ones place. The 1 in the ones place rounds up to 2 because the digit to the right in the tenths place is 7.

When the digit to the right is 5 or greater we round away from 0.

So , the rounded number is A = 2

Hence , the rounded number is A = 2

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