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kozerog [31]
3 years ago
6

A rectangular prism measures 8 inches by 8 inches by 12 inches. What is it's surface area

Mathematics
1 answer:
Arlecino [84]3 years ago
3 0
64 inches is the correct answer. To get it you need to multiply the length times the width.

(this is incorrect. Sorry for the inconvenience)
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Shauna borrows $400 from her parents to buy a phone. She agrees to pay them back plus 4% simple interest over one year
Kaylis [27]

Answer:

C

Step-by-step explanation:

7 0
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How do exoponets work? <br> Like 7 with a 2 on the top
inessss [21]

Answer:

7^2 =49

Step-by-step explanation:

Exponents represent a number and how many times you multiply it by itself. So 5^2 is 5*5 or 4^3 is 4*4*4. So 7^2 is 7*7, which is 49!

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3 years ago
A plane flying horizontally at an altitude of 2 mi and a speed of 540 mi/h passes directly over a radar station. Find the rate a
Rasek [7]

Answer:

The plane's distance from the radar station will increase about 8 miles per minute when it is 5 miles away from it.

Step-by-step explanation:

When the plane passes over the radar station, the current distance is the altitude h = 2. Then it moves b horizontally so that the distance to the station is 5. We can form a rectangle triangle using b, h and the hypotenuse 5. Therefore, b should satisfy

h²+b² = 5², since h = 2, h² = 4, as a result

b² = 25-4 = 21, thus

b = √21.

Since it moved √21 mi, then the time passed is √21/540 = 0.008466 hours, which is 0.51 minutes. Note that in 1 minute, the plane makes 540/60 = 9 miles.

The distance between the plane and the radar station after x minutes from the moment that the plane passes over it is given by the function

f(x) = \sqrt{((9x)^2 + 2^2)} = \sqrt{(81x^2+4)}

We have to compute the derivate of f in x = 0.51. The derivate of f is given by

f'(x) = \frac{162x}{2\sqrt{81x^2+4}}

also,

f'(0.51) = \frac{162*0.51}{2\sqrt{81*0.51^2+4}} = 8.2486

The plane's distance from the station will increase about 8 miles per minute.

4 0
3 years ago
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Step-by-step explanation:

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tigry1 [53]

Answer:

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Step-by-step explanation:

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(We have to ×2 to get from 5 to 10 so we must ×2 from 6 to 12)

10 : ? = Number of Boys to girls

10 : 12 = Number of Boys to girls

3 0
3 years ago
Read 2 more answers
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