There were 417 cell phones sold at an electronics store in January. Since then, cell phone sales at

this store have increased at a rate of 3.75% per month. At this rate of growth, which function can

be used to determine the monthly cell phone sales x months after January?

f(x) = 417(1.375)*

f(x) = 417(3.75)

f(x) = 417(0.0375)*

Step-by-step explanation:

This question is not complete; please find the question attached.

Sales of cell phones at the store is growing at the rate of 3.75% per month which reveals that the monthly sales of cell phone is growing exponentially.

Sales per month will be represented by the growth function,

Where f(x) = Monthly sales

A = Sales in the first month

r = rate of increase in the sales

x = Duration or time

Fro the given question,

A = 417,  r = 3.75

So the function showing the monthly sales will be,

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1