Idon’t get science at all my teacher doesn’t explain anything and i was out of school can anyone explain this to me

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Which word expression describes how much to calculate pressure