The following table shows the expressions that represent the sales of 4 companies:




Company A B C D


Sales 340(1.03)x 275(0.89)x 180(1.23)x 260(1.90)x



Rank the company sales by smallest to largest percent of increase and select the correct answer below.


A, B, C, D


A, D, B, C


B, A, C, D


C, B, D, A

Verified Answer :

I think it might be (B), not for sure but it has to be (B)


Answer:

The correct option is C.

Step-by-step explanation:

A general exponential function is defined as

\(y=a(1+r)^x\)

Where, a is initial value and r is growth rate.

The sales of company A is

\(y=340(1.03)^x\)

It can be written as

\(y=340(1+0.03)^x\)

Therefore the initial sales of company A is 340 and percent of increase is 3%.

The sales of company B is

\(y=275(0.89)^x\)

It can be written as

\(y=275(1-0.11)^x\)

Therefore the initial sales of company B is 275 and percent of increase is -0.11%. It means sales decrease by 11%.

The sales of company C is

\(y=180(1.23)^x\)

It can be written as

\(y=180(1+0.23)^x\)

Therefore the initial sales of company C is 180 and percent of increase is 23%.

The sales of company D is

\(y=260(1.90)^x\)

It can be written as

\(y=260(1+0.90)^x\)

Therefore the initial sales of company D is 260 and percent of increase is 90%.

We have to rank the company sales by smallest to largest percent of increase.

\(-11\%<3\%<23\%<90\%\)

\(B

Therefore the correct option is C.