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stellarik [79]
3 years ago
6

What is the surface area of a cube whose edges are 11 inches long?

Mathematics
2 answers:
Dennis_Churaev [7]3 years ago
8 0
Surface area is the total area of the surface. A cube has 6 surface, and each surface is the same. Each surface is a 11 by 11 square. Therefore there will be 6 11in. x 11in. surfaces. The math would be 11x11x6 =726.
Zarrin [17]3 years ago
5 0

Answer:

726 in²

Step-by-step explanation:

The surface area of a cube is the area of each side of the cube multiplied by 6 (since the cube has 6 sides).

To know what is the area of each side, the formula is A= l² where l is the length. Therefore we would have that the area is 11²=121.

Now we are going to multiply this number by 6 to find the surface area, SA = 121 x 6 = 726 in²

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7 0
3 years ago
A square storage unit has a volume of 607.5 ft3. The height of the unit is 7.5 ft. What are the length and width of the storage
Eduardwww [97]

Answer:

9ft

Step-by-step explanation:

The base area of the storage is its volume divided by height

A = \frac{V}{h} = \frac{607.5}{7.5} = 81 ft^2

Since this base is a square, its length and width is of equal length, which is

\sqrt{A} = \sqrt{81} = 9ft

4 0
3 years ago
Read 2 more answers
Samantha puts an initial $500 into a savings account. The account has a 4% annual compound interest rate. What is the function t
konstantin123 [22]
Hello! I can help you with this!

a. The function that would best represent Samantha's account is f(5) = 500(1 + 0.04)^5. This is because $500 is the principal, the interest rate is 4%, and we're looking for the amount in the savings account 5 years later.

b. Okay. 1 = 0.04 is 1.04. 1.04^5 is 1.216652902. It's a long decimal, but don't delete it. Multiply that decimal by 500 and you get 608.32645 and other numbers behind it or 608 when rounded to the nearest dollar. Samantha will have about $608 in her savings account in 5 years.

Note: The formula goes like this: f(x) = P(1 + r)^x. This means, you add 1 and the simple interest rate in decimal form together and raise that up by the exponent. There is no shortcuts for this, so you'll have to use the calculator. There will be a very long decimal, but don't clear it. Instead, multiply it by the principal to get the answer. It seems very complicating, but if you do this right, it gets easier overtime and you'll make less errors. There are more complex problems out there, so this formula is very important, but it was kept simple for this question.
7 0
3 years ago
Simplify the expression shown. You must show your work to receive credit.
ZanzabumX [31]

ANSWER

12 \sqrt{5}

EXPLANATION

The given expression is

\sqrt{2}  \times  \sqrt{72}  \times  \sqrt{5}

The middle radical contains a perfect square.

\sqrt{2}  \times  \sqrt{36 \times 2}  \times  \sqrt{5}

\sqrt{2}  \times  \sqrt{36}   \times  \sqrt{2} \times  \sqrt{5}

6\sqrt{2}  \times  \sqrt{2} \times  \sqrt{5}

Note that:

\sqrt{a}  \times  \sqrt{a}  = a

6\times 2 \sqrt{5}  = 12 \sqrt{5}

4 0
2 years ago
Can u help? this is due in an hour
Marysya12 [62]

Answer:

<em> 4 pairs of earrings </em>

Step-by-step explanation:

3.75 e + 9.50 < 25

3.75 e < 25 - 9.50 = 15.50

e < 15.50 ÷ 3.75 ≈ 4.13

e =<em> 4 pairs of earrings</em>

3 0
2 years ago
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