The number of the specimens would be in the culture after 5 minutes will be 7,962.62.
<h3>What is an exponent?</h3>
Consider the function:
y = a (1 + r) ˣ
Where x is the number of times this growth occurs, a = initial amount, and r = fraction by which this growth occurs.
A bacteria culture grows at a rate of 20% per minute. 
If the culture initially has 3,200 bacteria specimens.
Then the equation will be 
y = 3200 (1 + 0.2) ˣ
y = 3200 (1.20) ˣ
Then the number of the specimens would be in the culture after 5 minutes will be 
y = 3200 (1.20)⁵
y = 7962.62
More about the exponent link is given below.
brainly.com/question/5497425
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Answer:
I(7)   =  22.96 W/m²
Step-by-step explanation:
Let intensity of light, be  I(d)   where d is distance. There must be a proportionality factor K such as 
I(d)  = K /d²
Now for d = 5 m    I(d)  =  K* 1/d²
then  45 * 25 = K
K =  1125
To find the intensity when the distance from the light bulb is 7 m away
I(7)   =  K / 49
I(7)   =  1125/49   W/m²
I(7)   =  22.96 W/m²