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alex41 [277]
3 years ago
11

Find the surface area of each rectangular prism given its length, width, and height. Choose the correct answers.

Mathematics
2 answers:
Jet001 [13]3 years ago
8 0
To answer this question we have to go through each answer, and use this equation:
(a = area, w = width, l = length, h = height)
a=2(wl+hl+hw)
to solve, and see if it's correct.

A) a=2(9·4+3·4+3·9) = 150
<span>Correct!

</span>B) a=2(3·7+4·7+4·3) = 122
Incorrect.

C) a=2(5·8+5·8+5·5) = 210
Incorrect.

D) a=2(7·5+6·5+6·7) = 214
Correct!

The correct answers are A, and D. 

Hope this helped! Please comment or DM me if you have anymore questions. :)
ZanzabumX [31]3 years ago
6 0

Answer:

A and D

Step-by-step explanation:

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The circumference of the equator of a sphere was measured to be 82 82 cm with a possible error of 0.5 0.5 cm. Use linear approxi
True [87]

Answer:

The maximum error in the calculated surface area is approximately 8.3083 square centimeters.

Step-by-step explanation:

The circumference (s), in centimeters, and the surface area (A_{s}), in square centimeters, of a sphere are represented by following formulas:

A_{s} = 4\pi\cdot r^{2} (1)

s = 2\pi\cdot r (2)

Where r is the radius of the sphere, in centimeters.

By applying (2) in (1), we derive this expression:

A_{s} = 4\pi\cdot \left(\frac{s}{2\pi} \right)^{2}

A_{s} = \frac{s^{2}}{\pi^{2}} (3)

By definition of Total Differential, which is equivalent to definition of Linear Approximation in this case, we determine an expression for the maximum error in the calculated surface area (\Delta A_{s}), in square centimeters:

\Delta A_{s} = \frac{\partial A_{s}}{\partial s} \cdot \Delta s

\Delta A_{s} = \frac{2\cdot s\cdot \Delta s}{\pi^{2}} (4)

Where:

s - Measure circumference, in centimeters.

\Delta s - Possible error in circumference, in centimeters.

If we know that s = 82\,cm and \Delta s = 0.5\,cm, then the maximum error is:

\Delta A_{s} \approx 8.3083\,cm^{2}

The maximum error in the calculated surface area is approximately 8.3083 square centimeters.

6 0
3 years ago
Does this graph represent a function? Why or why not?
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8 0
3 years ago
Help I am being timed
Schach [20]
6.5x2.5=16.25
0.6x2.5=1.5
6.0x2.5=15

1.) 1.5
2.) 15
3.) 16.25

I hope that helped. Good luck!
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4 years ago
The mass of the moon rocks 3.5 kilograms. What is the mass of the moon rock in grams
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4 years ago
Read 2 more answers
Solve to find the value of x. -5x=75<br><br> I need help
san4es73 [151]

Answer:

x= -15

Step-by-step explanation:

Divide to both sides by -5 to isolate the variable.

<u>-5x</u>=<u>75</u>

-5   -5

x= -15

This gives you the answer of x= -15.

3 0
3 years ago
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