Wayne needs to drive 470 miles to reach milwaukee. suppose he drives at a constant speed of 50 miles per hour. which function represents wayne’s distance in miles from milwaukee in terms of the number of hours he drives?
a.
y = 420x
b.
y = 470 + 50x
c.
y = 50 − 470x
d.
y = 50 + 470x
e.
y = 470 − 50x

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.