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3 years ago

Used DVDs are on sale for a price of 5 for $20. At that price, how much will is cost to buy 12 used DVDs?

Mathematics

2 answers:

Levart [38]3 years ago

6 0

If you reduce the 5 for 20, you will get 1 for $4. Therefore, 12×4 will be the answer ($48)

siniylev [52]3 years ago

5 0

Hey there!

We know that 5 are $20, if we have the same rate then:

$20/5= 4

Each movie costs $4.

$4 * 12= $48

12 movies will cost $48 dollars.

I hope this helps!

~kaikers

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Item 16 A sphere has a radius of 8 centimeters. A second sphere has a radius of 2 centimeters. What is the difference of the vol

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$672\pi \text{ cm}^3$ .

Step-by-step explanation:

We have been given that a sphere has a radius of 8 centimeters. A second sphere has a radius of 2 centimeters. We are asked to find the difference of the volumes of the spheres.

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$\text{Difference of volumes}=\frac{4}{3}\pi(\text{8 cm})^3-\frac{4}{3}\pi(\text{2 cm})^3$

$\text{Difference of volumes}=\frac{4}{3}\pi(512)\text{ cm}^3-\frac{4}{3}\pi(8)\text{ cm}^3$

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