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3 years ago

If n squared = 64, what is the value of n squared?

Mathematics

1 answer:

aleksandrvk [35]3 years ago

4 0

If you are asking what n is then n=8 because 8 times 8 = 64.

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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. Th

Irina-Kira [14]

Given that the volume of the aquarium is 20m^3.

Volume = Area of Base x height

Area of Base = Volume / height = 20/h

Given that the aquarium has a square base.

Area of square = l^2

Thus, the length of the base of the aquarium is $\sqrt{area \ of \ base} = \sqrt{ \frac{20}{h} }$

The frame is to cover 8 sides with the length equal to the length of the base and 4 sides with the length of the height.

Thus, the total perimeter of the frame is given by $8\sqrt{\frac{20}{h}}+4h= \sqrt{64\left(\frac{20}{h}\right)}+4h = \sqrt{\frac{1,280}{h}}+4h$

Area of the four side faces of the aquarium is 4 times the length of the base times the height = $4\times\sqrt{ \frac{20}{h} }\times h=\sqrt{16\left(\frac{20}{h}\right)h^2}=\sqrt{320h}$

Total area to be covered by grass is the base and the four side faces and is given by $\frac{20}{h}+\sqrt{320h}$

Cost of the entire metal frame = $7\left(\sqrt{\frac{1,280}{h}}+4h\right)= \sqrt{49\left(\frac{1,280}{h}\right)}+7(4h) = \sqrt{\frac{62,720}{h}}+28h$

Cost of the entire grass = $8\left(\frac{20}{h}+\sqrt{320h}\right)=\frac{160}{h}+\sqrt{64(320h)}=\frac{160}{h}+\sqrt{20,480h$

Therefore, total cost in terms of the height, h, is given by

$C=\sqrt{\frac{62,720}{h}}+28h+\frac{160}{h}+\sqrt{20,480h$

3 0

3 years ago

Answer this please i don't really understand it so help me please lol.

expeople1 [14]

Answer:

Step-by-step explanation:

Step 1:

( 9 - 3 ) + 20 ÷ 4 Equation

Step 2:

6 + 20 ÷ 4 Subtract

Step 3:

6 + 5 Divide

Answer:

11 Add

PEMDAS:

1. Parenthesis

2. Exponents

3. Multiplication

4. Division

5. Addition

6. Subtraction

Hope This Helps :)

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2 years ago

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How to find the vertex: i keep getting (-1,3) what am i doing wrong y=x^2+2x+6

larisa86 [58]

You have the -1 correct but when (or if) you put it in the calculator then you have to put it in parentheses and you should get 5 so it would be (-1,5)

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3 years ago

Please help thank you.

Tamiku [17]

Answer:

first solution for first question, and last solution for second questions..

Step-by-step explanation:

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2 years ago

What is the discount and sale price of a $300 item that has been discounted 10%?

maxonik [38]

Answer: The discount is $30, making the sale price $270.

Step-by-step explanation: Take your initial value times the percent of your discount to find the discount amount: in this case, it is 300 * .10 = 30. Then you can subtract that value from your initial value, 300-30=270 to get the sale price.

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2 years ago

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