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denis-greek [22]
3 years ago
9

The volume of a sphere is 2254 pi m^3 what is the surface area of the sphere to the nearest 10th

Mathematics
1 answer:
Advocard [28]3 years ago
8 0
By definition. The volume of the sphere is:
 V = (4/3) * (pi) * (r ^ 3)
 Where,
 r: radius of the sphere.
 Substituting values:
 2254 pi = (4/3) * (pi) * (r ^ 3)
 Clearing the radio we have:
 r ^ 3 = (3/4) * (2254)
 r = ((3/4) * (2254)) ^ (1/3)
 r = 11.91255883
 Then, the surface area is:
 A = 2 * pi * r ^ 2
 Substituting values:
 A = 2 * 3.14 * (11.91255883) ^ 2
 A = 891.6 m ^ 2
 Answer:
 
The surface area of the sphere is:
 
b. 891.6 m ^ 2
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a_sh-v [17]

Answer:

  $79.63

Step-by-step explanation:

You can figure this by estimating. 16% is a little less than 20%, which is 1/5. $497.69 is almost $500. So, 1/5 of that is almost $100, and a little less than that is about $80. The closest answer choice is $79.63.

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If you want to figure it exactly, you can do the multiplication ...

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5 0
3 years ago
Solvex - 3x + 2 = 0 using substitution.<br> U=<br> x<br> X^2<br> 3x^2<br> X^4
nikitadnepr [17]

Answer:

x = \frac{2}{3} Is the correct answer

Step-by-step explanation:

Move all terms that don't contain x to the right side and solve.

In pic

(Credit:Symbolab)

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3 0
3 years ago
Read 2 more answers
A recipe for lemon bars called for 9" X 13" pan. How many 1" X 1" bars can be cut? How many 2" X 2" bars can be cut? How much is
gregori [183]

The number of bars which can be cut for the 1" X 1" and 2" X 2" square bars are; 117 and 29 units respectively.

<h3>How many bars can be cut from the pan in each case?</h3>

The total area of the given pan can be evaluated as follows;

Area = length × width

= 9 × 13

= 117 square units.

Hence, the number of 1" X 1" bars can be cut which can be cut from the pan;

= 117/(1×1)

= 117 1" X 1" bars.

For the 2" X 2" square bars, we have;

= 117/(2×2);

29 remainder 1 square unit.

Ultimately, one square unit of the pan is wasted for the 2" X 2" square bars.

Read more on area;

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8 0
2 years ago
A 400 gallon swimming pool is being drained. After three hours, 250 gallons have been drained. If the rate of drainage continues
Nezavi [6.7K]
If you would like to know how long will it take to drain the pool, you can calculate this using the following steps:

3 hours ... 250 gallons
x hours = ? ... 150 gallons (= 400 - 250)

3 * 150 = 250 * x
x = 3 * 150 / 250 
x = 1.8 hours

3 hours + 1.8 hours = 4.8 hours

The correct result would be B. 4.8 hours.
8 0
3 years ago
Pls help I need a good grade
pshichka [43]

Answer:

a

Step-by-step explanation:

because it is

7 0
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