7. your friend is standing on top of a building, which is 130 ft. above the ground, looking down at a tree that is 40 ft. away from the base of the building.
what is the angle of depression from the person to the base of the tree? round to the nearest degree. show all work.

Which graph depicts the path of a projectile

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?

Write 5 in the form of a/b using integers to show it as a rational number