Answer:
16 runner
Step-by-step explanation:
It is given that,
Each group will need to run a race that is 1/2 of a mile long. Each runner has to run 1/8 of a mile in the race.
Let there are x no of runners. ATQ,

So, there are 16 runner that are needed for each relay race group.
Answer: 3987.8cm³
Step-by-step explanation:
Volume of a cylinder = πr²h
where
π = 3.14
r = diameter / 2 = 10in/2 = 5inches
h = height = 20in
Volume = πr²h
= 3.14 × 5² × 20
= 3.14 × 25 × 20
= 1570inches³
Since 1 inch = 2.54cm
1570 inch = (1570 × 2.54) = 3987.8cm³
Therefore, the volume of the cylinder is
3987.8cm³ cubic centimeters.
Answer:

Step-by-step explanation:
The standard equation of a parabola with vertex at the origin and and directix x=-p is of the form

Where p is simplify the distance from the origin to the directrix.
That is


This simplifies to

The ratio 12:20 because you need it to be equal to 3:5. 3 times 4 which makes 12 so you need to multiply 5 with 4 too