The Height in feet above the ground of an arrow after it is shot can be molded  by Y= -16 X squared +63+4. Can the arrow pass over a tree that is 68 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?