Someone please help me this is the last question on my homework. I have to write a quadratic equation for this word problem...
You are riding a ski lift at a position 57 feet off the ground. You spot one of your friends skiing below. To get his attention you chuck a snowball at him. How long will it take to hit your friend's head who is 42 feet below? Your friend is 5 1/2 feet tall.

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?