B is the answer
the formula is :

which r stands for radius
and h stands for height
the diameter is 16
so the radius is

hope you understand it
Answer:
y=3/4m
Step-by-step explanation:
All proportional relationships have the form y=mx where m is the rate of change from the families donations x to the business donations y. We can find the rate of change m by substituting values we already know. We know when x=$12 then y=$9.
9=m*12
We solve for m by dividing by 12 on both sides.
m=9/12
This simplifies to 3/4 so
m=9/12=3/4.
The equation is y=3/4m
Im so sorry but i am not into that:(
Let w and l be the length and height of the rectangle.
We know that:

Substitute the first equation in the second:

Use the first equation to compute the length:

So, length = 7 cm; width = 6 cm