Assume the amount of time statistics students spent studying for the Math 10 final exam is exponentially distributed with a mean of 4.2 hours. Eighty percent (80 %) of students studied more than how many hours? a. 0.9
b. 3.4
c. 6.8
d. 7.6

468

step-by-step explanation:

x+14

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)