A plane is flying at 31,348 feet. It needs to rise to 36,000 feet in two stages
In stage 1, it rises 5% of its initial altitude of 31,348 feet.
In stage 2, it rises at a rate of 140.3 feet per minute.
How many minutes does it take for the plane to rise during stage 2?

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.