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Sergio039 [100]
3 years ago
6

A kickball has a radius of 7 inches. Calculate the volume of the kickball. Use 3.14 to for . Volume of a sphere can be calculate

d by the formula: V=4/3 r^3 (round to the nearest whole number)
Mathematics
1 answer:
ValentinkaMS [17]3 years ago
6 0

Answer:

V = 205 in^3 to the nearest whole number

Step-by-step explanation:

V = 4/3 π r^3

Plugging in the given information:

V = 4/3 * 3.14 * 7^2

V = 205.147.

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Carlos is filling a spherical balloon with water. if he increases the volume of the balloon from 4,188.79 cubic centimeters to 1
Harrizon [31]

We know that the volume of a sphere of radius r is given by

V=\frac{4}{3}\pi r^3

Now, we have been given the initial volume was 4,188.79 cubic centimeters. Let us find the radius at this time.

Substituting the value of volume in the above equation, we get

4,188.79=\frac{4}{3}\pi r^3\\
\\
4\pi r^3=4,188.79 \times 3\\
\\
r^3=\frac{4188.79 \times 3}{4\pi}\\
\\
r^3=1000\\
\\
r=10

Now, the final volume is given by 14,137.167 cubic centimeters. Thus, we have

14137.167 =\frac{4}{3}\pi r^3\\
\\
4\pi r^3=14137.167  \times 3\\
\\
r^3=\frac{14137.167\times 3}{4\pi}\\
\\
r^3=3375\\
\\
r=15

Now, let us find the surface areas for these two radii.

For r=10

Surface area is given by

S=4\pi r^2\\
\\
S=4\times 3.14 \times (10)^2\\
\\
S=1256 \text{ square centimeters}

Similarly, for

r=15\\
\\
S=4\times 3.14\times (15)^2\\
\\
S=2826 \text{ square centimeters}

Therefore, the increase in the surface area is given by

\Delta S= 2826-1256= 1570 \text{ square centimeters}

Hence, the average rate at which the surface area is changing is given by

\frac{1570}{12}=130.8

Therefore, the average rate at which the surface area is changing is given by 130.8 square centimeters per second.

7 0
3 years ago
I need help please.
VARVARA [1.3K]

Answer:

that anzwer will be (9) ok

3 0
3 years ago
Read 2 more answers
How do you determine the last digit in any measured number? Select one: Round up to one digit larger than the smallest precisely
murzikaleks [220]

Answer:

Estimate one digit past the smallest precisely known digit or marking

Step-by-step explanation:

To determine the last digit in any measured number : Estimate one digit past the smallest precisely known digit or marking

This is employed mostly when trying to round off a measured or calculated number to a precise number of digits and in other to determine the last digit in the given number we will have to estimate one digit past the smallest precisely known digit

7 0
3 years ago
Fractions are equivalent to 9/8
astraxan [27]

Answer:

9/8, 18/16, 27/24, 36/32, 45/40, 54/48, 63/56, 72/64, 81/72, 90/80, and so on ...

Explanation:

Two fractions are equivalent when they are both equal when written in lowest terms. The fraction 18/16 is equal to 9/8 when reduced to lowest terms. To find equivalent fractions, you just need to multiply the numerator and denominator of that reduced fraction (9/8) by the same integer number, ie, multiply by 2, 3, 4, 5, 6 ...

18/16 is equivalent to 9/8 once 9 x 2 = 18 and 8 x 2 = 16

27/24 is equivalent to 9/8 once 9 x 3 = 27 and 8 x 3 = 24

36/32 is equivalent to 9/8 once 9 x 4 = 36 and 8 x 4 = 32

5 0
3 years ago
Convert 235/15 into a mixed number
larisa86 [58]
To convert 235/15 into mixed fraction
divide 235 by 15
so mixed fraction will be 15whole10/15
6 0
3 years ago
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