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vova2212 [387]
3 years ago
8

Katie approximated the volume and the surface area for a ball she was using for some exercises by assuming the ball is a sphere.

She was surprised when the numerical value of the volume in cubic inches was the same as the numerical value of the surface area in square inches. What is the radius of the ball?
Mathematics
1 answer:
Mariana [72]3 years ago
8 0

Answer:

3

Step-by-step explanation:

Volume of sphere:

4/3 * pi * r^3

Surface Area of Sphere:

4 * pi * r^2

So if V = SA

4/3 * pi * r^3 = 4 * pi * r^2

<u>4</u>/3 * <u>pi</u> * r^3 = <u>4</u> * <u>pi</u> * r^2

1/3 * r^3 = r^2

1/3 * r = 1

r = 3

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17.5%

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take 25% x 1/2..............

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Karen is seven years older than suzanne.Four years ago,karen was twice as old as suzanne was.How are they now?
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Jada bought 3 shirts that cost $19.99 each before discount. What was her total after the discount? The percentage discount at a
Alex777 [14]
Total after the discount would be $77.96
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4 years ago
Triangle JKL is dilated from the origin at a scale factor of 10 to create triangle J′K′L′.Select the option that completes the s
Aneli [31]

Given: Triangle JKL is dilated from the origin at a scale factor of 10 to create triangle J′K′L′.

Required: Correct option that complete the statement.

Explanation:

Now, triangle is dilated from the origin at a scale factor of 10.

So, the sides will become larger, but angles will remain the same.

Hence, the triangles will be similar as sides will be in proption (SSS rule).

So, The triangles are similar because their corresponding sides are proptional and their corresponding angles are congurent.

Final Answer: Second group is correct answer.

5 0
1 year ago
A rectangular kitchen is 4 meters longer than it is wide. If the area of the kitchen is 192 square feet meters, how many meters
Lunna [17]
Lets x = width
length = x + 4 (4 meters longer than wide)

A = L * W
192 = x ( x +4)
192 = x^2 + 4x
x^2 + 4x - 192 = 0
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 x - 12 = 0, x = 12
 x + 16 = 0, x = -16
so width x = 12
length = 12 + 4 = 16 (4 meters longer than wide)

answer. J
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3 0
3 years ago
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