If Sammy eats 6/7 of a pizza in 2/21 of an hour, how many pizzas will he eat in one hour?

9 pizzas

Step-by-step explanation:

We can use ratios to solve

6/7               x pizza

 =

2/21 hour         1 hour

Using cross products

6/7 *1 = 2/21 x

Multiply each side by 21/2

6/7 * 21/2 = x

Rewriting

6/2 * 21/7 =x

3 *3 =x

9

9 pizzas

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100