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3 years ago

Help me, please and thank you

Mathematics

2 answers:

timurjin [86]3 years ago

7 0

The answer is 40 and 30

kherson [118]3 years ago

5 0

Answer: 40, 30

Step-by-step explanation:

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The radius of a softball is 3.75 cm, and the radius of a table tennis ball is 2 cm. The volume of the softball is how many times

Natali5045456 [20]

Answer:

The volume of the softball is 6.6 times the volume of the tennis ball

Step-by-step explanation:

we know that

The volume of a sphere is equal to

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

step 1

Find the volume of the softball

we have

$r=3.75\ cm$

substitute

$V=\frac{4}{3}(3.14)(3.75)^{3}=220.8\ cm^{3}$

step 2

Find the volume of the tennis ball

we have

$r=2\ cm$

substitute

$V=\frac{4}{3}(3.14)(2)^{3}=33.5\ cm^{3}$

step 3

Divide the volume of the softball by the volume of the tennis ball

$220.8\ cm^{3}/33.5\ cm^{3}=6.6$

therefore

The volume of the softball is 6.6 times the volume of the tennis ball

<em>Alternative Method</em>

we know that

If two figures are similar, then the ratio of its volumes is equal to the scale factor elevated to the cube

The scale factor is equal to the ratio of its radius

$\frac{3.75}{2}=1.875$

therefore

The scale factor elevated to the cube is

$1.875^{3}=6.6$

therefore

The volume of the softball is 6.6 times the volume of the tennis ball

5 0

3 years ago

What times what times what equals 121

defon

Answer:

11x11=121

Step-by-step explanation:

121 is equal to 11 times 11.

3 0

3 years ago

Hello! This is my first question ever. I am in AP Calculus and am working on a redo. I know the correct answer but don't know ho

Kipish [7]

Since $\Delta x=\dfrac{b-a}n$ , and you have a corresponding term in the given Riemann sum of $\dfrac5n$ , you know the integral is being taken over an interval of length 5, so you can omit the second choice.

Next, $f(a+i\Delta x)$ corresponds to $a=3$ with $\Delta x=\dfrac5n$ . The fact that $a=3$ alone tells you that the interval of integration starts at 3, and since we know the interval has length 5, that leaves the first choice as the correct answer.

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3 years ago

-8x + 9y = 3 <br> 5x - 9y = 15

Masja [62]

You can use photo math for This

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3 years ago

An expression is shown. (3x^2+2x-5) -(5x^2-4x+1)

Readme [11.4K]

Step-by-step explanation:

solve the equation by placing correct sign

5 0

3 years ago