A park bench sits 745 feet from the base of the Gateway Arch in St. Lous, Missouri. The angle on elevation from the ground where the park bench sits t the top of the Gateway Arch is 32. How tall is the Gateway Arch? Round to the nearest tenth.
feet

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.