There are initially 80 bacteria cells in Petri dish. The number of bacteria cells double every 30 minutes. How many bacteria cells will be in the Petri dish after 3 hours?

After 3 hours we will have 6 doublings.

2^6 = 64

Therefore the number of bacteria will be 80 * 64 =

5,120 bacteria

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)

a

step-by-step explanation: