Given that a student is in 10th grade, what is the probability that the student is also not involved in after-school activities?

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool. how far is the ball from the opposite edge of the pool

Can someone explain to me how to do

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250