Aspecies of beetles population grows 32% every year. suppose 100 beetles are released into the field. construct an exponential model for this population.

The correct answer is: 

Explanation:

The exponential form should be like: 

Where a = 100
b = 1.0 + 32/100 = 1.32 (since 32% growth every year)
x = Years

Therefore the form would becomes:


Let's verify this form:

After 1 year; x = 1:
= 132 (As expected since there is 32% increase every year; Hence 100 + 32 = 132)

After 2 years; x = 2:
= 174.24 ((As expected since there is 32% increase every year; Hence in first year:100 + 32 = 132 whereas 32% increase of 132 would be 42.24; hence in second year: 132 + 42.24 = 174.24) and so on... (verified)

$137.45

Step-by-step explanation:

First, we need to find the area of the circular rug in square feet.

Then we will multiply that with 1.75 to get total cost.

First,

Area of Circle =

Where r is the radius (which is half of diameter)

Given, diameter = 10 feet

Radius = 10/2 = 5 feet

Now, the area (A) :

So, total cost would be:

78.54 * 1.75/sq ft = $137.45