What is the density of the football in g/cm

  see below.

Explanation:

Your question is lacking the necessary parameters, so I will assume the values to enable me to solve it:

Mass of football = 20 grams

Volume of football = 100

To find the density of the football;

Density is simply mass per unit volume of an object such as a football.

Mathematically, the density of an object is given by the formula;

Density=

Substituting the assumed values into the above formula;

Density=

Density= 0.2g/

Therefore, the density of the football is     0.2g/ .

For you: You can substitute the appropriate parameters into the formula to get the exact density of the ball.

a.) is the correct answer.

explanation:

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y