A dolphin jumps from the water at an initial velocity of 16 feet per second. The equation h = -8t^2 + 16t models the dolphin's height at any given time t. 1. How long will the dolphin be in the air?

2. How high does the dolphin jump?

3. How long after leaving the water will he be at the highest point of his jump?​

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.