An aquarium with a square base has no top. There is a metal frame. Glass costs 8 dollars/m^2 and the frame costs 7 dollars/m. The volume is to be 20 m^3. Express the total cost C in terms of the height h in meters. (Hint: work out the cost of the glass and frame separately.)

Answers

Answer 1
Let x = one of the side lengths of the base.
Then area of the base = x². So volume of the base = x²h.
That gives us x²h = 20. Solving for x, we get x = √(20/h²).

Glass is needed to cover the sides of the aquarium. There are 4 sides and 1 base. Area of a side = hx = h√(20/h²). Area of the base = x² = 20/h. Total area of glass = h√(20/h²) + 20/h. So the cost for glass = 8 * [h√(20/h²) + 20/h] = 8 h√(20/h²) + 160/h.

Metal frame is needed along the edges of the sides. There are 4 edges on the top, 4 edges in the bottom and 4 vertical edges. So the total length of metal frame = 4x + 4x + 4h = 8 √(20/h²) + 4h. Then the cost for metal frame = 7 * [8 √(20/h²) + 4h] = 56 √(20/h²) + 28h.

So the total cost = 8 h√(20/h²) + 160/h +  56 √(20/h²) + 28h
   

Related Questions

which class (sophomore, junior, or senior) had the lowest cumulative college gpa? what is the approximate value of that gpa?

Answers

Juniors has the lowest cumulative college gpa and the approximate value of that gpa is 2.75
Final answer:

Without the specific GPA data for the sophomore, junior and senior classes, it's impossible to determine which of these classes had the lowest cumulative college GPA.

Explanation:

Unfortunately, from the data provided, we can't determine which class (sophomore, junior, or senior) had the lowest cumulative college GPA and the approximate value of that GPA. The information given relates more to correlation coefficients, random number generation, precalculus classes, and high school student classifications, but nothing specifically providing the desired GPA data.

Without specific GPA data for each class (sophomore, junior, senior), it's not possible to make an accurate deduction. An authoritative answer would be dependent on obtaining this specific data.

Learn more about College GPA here:

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Three is less than the sum of a number s and 4

Answers


[tex]s > - 1[/tex]
That is your answer for s.

Answer:

Expression is,

[tex]3 < s + 4[/tex]

Solution is -1 < s.

Step-by-step explanation:

Given phrase,

Three is less than the sum of a number s and 4,

∵ Sum of s and 4 = s + 4,

Now, in the inequality,

We use < for 'less than'

Hence, 3 is less than s + 4

[tex]\implies 3 < s + 4[/tex]

Which is the required expression,

By solving it,

[tex]3-4<s[/tex]

[tex]\implies -1<s[/tex]

Farrah is writing a mathematical argument to show how much time she spends studying each week. Which data display is the most appropriate for her argument? A. table with all subjects and how much time she studies each subject every week B. graph of the relationship between her grades and number of hours she studies C. number sentence adding the hours she spends studying each week D. list of the names of each subject

Answers

A is correct because it shows all the classes and she just has keep track of the time
A would be the best and most practical option

What is the equation in point-slope form for the line parallel to y = 5x - 4 that contains P(-6, 1)?
Select one:
a. x - 1 = -5(y + 6)
b. y + 1 = 5(x + 6)
c. y - 1 = -5(x + 6)
d. y - 1 = 5(x + 6)

PLS HELP

Answers

5 is your slope
(-6,1) -6 is your x and 1 is y
y-1=5(x-(-6) or y-1=5(x+6)
D.
c) y - 1 =5 (x + 6) is the answer

please explain how you got the answer

Answers

Hi there!

To find this, do these steps.

Find the square root of 324.

√324 = 18

So, now we have 18 - √9

Find the answer of √9.

√9 = 3

Now we have 18 - 3

Simplify.

18 - 3 = 15.

Hope this helps!! ♥♥

10 PTS! HELP!
Create your OWN question of dividing polynomials
(your question should have an answer!)

Answers

Divide: (3x^2+5x+2) (by) (2x+1)

Answer: 3/2x+7/4 with a remainder of 1/4

find the gcf of the monomial factor 15a-25b+20

Answers

the free websoftware for math professionals does not understand the question



which is equal to 300

Answers

What does this exactly mean

the quotient of nine times a number and seven

Answers

Answer:9(n +7)


The quotient of nine times a number and seven
Your answer to that question will be 9y÷7=x 

STILL LOOKING FOR THIS ANSWER. PLEASE HELP IF YOU CAN.
Alice is on the line x = 4, and she is √40 away from (2,3). What is the sum of the possible y-coordinates of the point Alice is at?

Answers

To answer this question, we will use the rule of the distance between two points which is stated as follows:
d^2 = (x1-x2)^2 + (y1-y2)^2

The givens are:
d = sqrt(40) .............> d^2 = 40
point 1 is (4,y1) 
point 2 is (2,3)
Therefore,
x1 = 4
x2 = 2
y1 = y1
y2 = 3

Substitute with the givens in the above equation:
40 = (4-2)^2 + (y1-3)^2
40 = 4 + y1^2 - 6y1 + 9
y1^2 - 6y1 + 9 + 4 - 40 = 0
y1^2 - 6y1 -27 = 0
(y1-9)(y1+3) = 0
either: y1 = 9
or: y1 = -3

What is 2 times pi times r?
pi is 3.14 or 22/7.
What is r?

Answers

"2 times pi times r", which can be written as "2*pi*r", represents the circumference of a circle. This is the distance around the circle (aka perimeter)

r is the radius of the circle

if you know the diameter then you can divide the diameter in half to get the radius (example: diameter is 10 so the radius is 5)
r is the radius of the circle

The solution to -5 m = -20 is negative.

True
or
False

Answers

-20/-5 = m
20/5 = m
m = 4

Since we see the number 4 is a positive number and NOT negative, than the answer would be FALSE.

Answer:

False

Step-by-step explanation:

I had this same assignment

Henry made 3 batches of cookies. Each batch creates 12 cookies. If Henry gave the same amount of cookies to all of his 20 coworkers, how many cookies will Henry have left?

Answers

he makes 3 batches of cookies...each batch contains 12 cookies...
so there are (3 * 12) = 36 cookies.
He wants to give the same amount of cookies to all of his 20 coworkers...

he can give each coworker 1 cookie and have 16 remaining cookies <=
3 batch of cookies and 12 cookies in each batch

12*3=36

So Henry has a total of 36 cookies he can give to his 20 coworkers

Subtract 36-20=16

Henry will have 16 cookies left over

Solve the equation using square roots. x^2 – 14 = –10

Answers

x^2 - 14 = -10
x^2 = -10 + 14
x^2 = 4....take the square root of both sides, eliminating the ^2
x = (+-) sqrt 4
x = 2 and x = -2

Answer:

[tex]x=\pm2[/tex]

Step-by-step explanation:

The given equation is

[tex]x^2-14=-10[/tex]

Add 14 to both sides of the equation.

[tex]x^2=-10+14\\\\x^2=4[/tex]

Now, take square root both sides. Whenever, we take square root both sides, we include plus minus sign

[tex]\sqrt{x^2}=\pm\sqrt{4}[/tex]

On simplifying, we get

[tex]x=\pm2[/tex]

Someone please help! I’ll give you 25 points!

Answers

The answer to this is the 3rd option
its the 3d one fgfgtfytgvgfvtugug

Carter can swim 25 yards of freestyle in 19 seconds what is the speed in yards per minute?

Answers

[tex] \frac{25 yards}{19 sec} x \frac{60 sec}{1 min}= \frac{1500 yards}{19 min} [/tex]

So 1,500 yards per 19 minutes or around 79 yards per minute

(i think)

Hope this helps!
The answer is 79 yards per minute. 

Suppose both employees work the same amount of time determine which employee earns more money

Answers

Employee B makes more money. In 4 hours employee B makes $40 while employee A makes $30 in 4 hours.

Brianni decided to ride her bike from her home to visit her friend Adam. Two miles away from​ home, her bike got a flat tire and she had to walk the remaining three miles to Adam​'s home. She could not repair the tire and had to walk all the way back home. How many more miles did Brianni walk than she​ rode?

Answers

she had got to bike a total of 2 miles, the other 3 of which she ended up walking. this means the trip was 5 miles long, all of which she walked.

walked: 8 miles.
biked: 2 miles

8 - 2 = 6 miles.

she walked 6 miles more than she ran.

Brianna walked 6 miles more than she ran.

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

she had got to bike a total of 2 miles, the other 3 of which she ended up walking. this means the trip was 5 miles long, all of which she walked.

walked: 8 miles.

biked: 2 miles

8 - 2 = 6 miles.

Hence, she walked 6 miles more than she ran.

To know more about an expression follow

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Multiply.

(3)(–21)
PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!1

Answers

The answer is -63, hope this helped you:)
3*(-21)=63
-63/3=-21
-63/-21=3

-63

How many solutions does the equation does 8x+16=8x-16 have

Answers

When we will solve the equation 8x+16=8x-16 by subtractig 8x from each sides then we will get,

+16=-16 which is mathematically not correct.

So, there is no solution for this system.

SOooooo I don't think I am really right but I came up with 8X9=14+5X2=23

A rectangle has length of 5.25 cm and area of 44.625 cm. What does the length of the rectangle have to be?

Answers

The area of a rectangle is defined to be its length times its width. What the question here is asking is: what do you have to multiply 5.25 cm by to get 44.625 cm²?

Answer: 8.25 cm

Step-by-step explanation:

We know that the area of rectangle is given by :-

[tex]\text{Area}=\text{Length}\times\text{Width}[/tex]

Given : The length of rectangle: l= 5.25 cm

The area of rectangle:[tex] A=44.625\ cm^2[/tex]

Substitute the values of A and l in the formula given above, we get

[tex]44.625=5.25\times\text{Width}[/tex]

Divide 5.25 both sides , we get

[tex]\text{Width}=\dfrac{44.625}{5.25}=8.5[/tex]

Hence , the other length of the rectangle have to be 8.25 cm.


Derrick surveyed a random sample of 100 students from his middle school to learn more about what type of school lunches are preferred. The table below shows the result of the survey:

 
Hamburgers
Spaghetti
Pizza
Sample #1
43
13
44
Sample #2
41
20
39


Which of the following inferences can be made based on the data?

Pizza is the most preferred lunch.
Spaghetti is two times more popular than pizza.
Hamburgers and pizza are preferred almost equally.
Spaghetti is two times more popular than hamburgers.

Answers

hamburgers = 43 + 41 = 84

spaghetti = 13 + 20 = 33

pizza = 44 +39 = 83

 since 83 & 84 are close the answer is:

Hamburgers and pizza are preferred almost equally.

Answer:

Hamburgers and pizza are preferred almost equally.

Step-by-step explanation:

The length of a rectangular field is 30 more than twice its width. Write an expression in simplest form for the perimeter of the field in terms of its width w.

Answers

The length of the field would be Length= 2w+30
(w=Width)
So you would do 2(2w+30)+2w.
Simplifying this would give you: 
4w+60+2w
This can be simplified further:
6w+60
I hope this helps!

The expression for the perimeter of a rectangular field where the length is 30 more than twice its width, in terms of the width w, is 6w + 60.

The perimeter of a rectangle is given by the formula P = 2l + 2w, where l is the length and w is the width of the rectangle. According to the problem, the length (l) of the rectangular field is 30 more than twice its width (w). So we can express the length as l = 2w + 30.

Substituting this expression into the perimeter formula, we get:

P = 2(2w + 30) + 2w

Simplifying this expression, we get:

P = 4w + 60 + 2w = 6w + 60

So, the expression for the perimeter of the field in terms of its width w is 6w + 60, which is already in its simplest form.

Evaluate (2-5i)(p+q)i when p=2 and q=5i

a. 29i

b. 29i-20

c. -21i

d. 29

Answers

Answer:

Answer:

The value of the (2 – 5i)(p + q)i is 29i .

Option (a) is correct .

Step-by-step explanation:

As the expression given in the question.

= (2 - 5i) (p + q)i

Simplify the above

= (2 - 5i) (pi + qi)

= 2pi + 2qi - 5pi²- 5qi²

As i² = -1

Put in the above

= 2pi + 2qi + 5p +5q

= 2i × 2 + 2i × 5i + 5 × 2 + 5 × 5i

= 4i + 10i² + 10 + 25i

As i² = -1

= 4i - 10 + 10 + 25i

= 29i

Thus the value of the (2 – 5i)(p + q)i is 29i .

Option (a) is correct .

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

on edge:)

do Dollar markdowns represent price increases to the original selling price.

Answers

No, dollar markdowns do not represent price increases to the original selling price.

In retail, a markdown refers to a reduction in the price of an item from its original selling price. When a dollar markdown occurs, it means that the price of the item has been decreased by a specific dollar amount. This reduction is typically implemented to stimulate sales, clear out excess inventory, or attract customers.

For example, if an item originally priced at $50 is marked down by $10, the new selling price would be $40. Therefore, dollar markdowns signify a decrease in the selling price relative to the original price, rather than an increase. They are a common strategy used by retailers to adjust pricing to match market demand and drive sales.

louise 1 1/4 pounds of roast Beef at $2.00 per pound and 2 1/2 pounds of turkey at $1.50 per pound what was her total cost?

Answers

2.00 * 1.25 = 2.50

1.50 * 2.5 = 3.75


3.75 + 2.50 = $6.25 total cost

write an equation in slope intercept form for the line that passes through (4,7) and is perpendicular to the line that passes through (3,6) and (3,15)

Answers

The line through (3,6) and (3,15) is vertical so the perpendicular slope is a horizontal line.
y=7
hmmm...this one is confusing because u r wanting a line that is perpendicular to a vertical line.....so that would be a horizontal line...an a horizontal line has a 0 slope

y = 7...but u need it in slope intercept form....y = 0x + 7 

** (3,6),(3,15)...when ur x's are the same, u have a vertical line

calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series

Answers

The total resistance of the combination is 650 + 350 + 1000 = 2000 ohms. This is because when resistances are connected in series, the resistance of the combination is equal to the sum of individual resistances. R = R1+ R2+ R3+ R4+....+ Rn where R is the total resistance and R1, R2, Rn etc are the individual resistances connected in series.
Final answer:

The total resistance for the given resistors connected in series is 2000 ohms.

Explanation:

To calculate the total resistance for resistors connected in series, you simply add up the individual resistances. In this case, the resistances are 650 ohm, 350 ohm, and 1000 ohm. So the total resistance would be:



Total Resistance = 650 ohm + 350 ohm + 1000 ohm = 2000 ohm

what is the area of a square picture with 16 inch sides

Answers

Hello!

To find the area, you take one side, (16) and multiply it by that number..

So, 16 * 16 = 256.

The area of a square with 16in sides is 256.

Hope this helps! ☺♥
Do 16 times 16. That's 256.

The area of the following rectangle is 30 square units. What is the value of x

a.6.4 units
b.8 units
c.27 units
d.12 units

Answers

Since the area of the rectangle is 30, we know the following:

(5)(x-2) = 30
Divide both sides by 5
x-2 = 6
Add both sides by 2
x = 8

That's your answer.
Have an awesome day! :)
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