Answer:
to guarantee that both formulas are the same.
Step-by-step explanation:
Dimensionally speaking, the volume is the cube of length. By direct comparison, we find that 
have length units, whereas 
have area unit, that is, the square of length.
Hence, to guarantee that both formulas are the same.
Answer:
PR = 12
Step-by-step explanation:
P-----------Q-----------R----------S
ratio
4:2:1
PS = 14
add the ration = 4 + 2 + 1 = 7
14 / 7 = 2
PQ at 4 x 2 = 8
QR at 2 x 2 = 4
RS at 1 x 2 = 2
------------
14
PR = PQ + QR
PR = 8 + 4
PR = 12
This is a parabola. 20 ft represents the height of the ball. Height is represented by the letter h. Thus you need to plug 20 into the equation for h and solve for t.
