In a Petri dish a certain type of bacterium doubles in number every 40 minutes, there were originally 64,or 2^6,bacteria in the dish after 20 minutes, the number of bacteria has doubled 3 times, multiplying by 2^3.Now the population of bacteria is 2^6•2^3. Expressed as a power, how many bacteria are in the Petri dish after 120

Step-by-step explanation:

Given

Increment = doubles every 40 minutes

Required

Determine the population after 120 minutes

First, we need to determine the fraction of 120 to 40

If for every 40 minutes, we have:

We'll have:

at the 120the minute

Apply law of indices

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

what i would say the best answer is a. 40.5