You are choosing between two different cell phone plans. the first plan charges a rate of 26 cents per minute. the second plan charges a monthly fee of $34.95 plus 12 cents per minute. how many minutes would you have to use in a month in order for the second plan to be preferable?

In order for the second plan to be preferable, a greater amount of 249.6 minutes would have to be used in one month.

Step-by-step explanation:

Let

x -----> the number of minutes in a month

y ----> the charge  monthly

we know that

First Plan

----> equation A

Second Plan

----> equation B

Equate the equations A and B and solve for x

so

For ----> is preferable the first plan

For ----> is preferable the second plan

therefore

In order for the second plan to be preferable, a greater amount of 249.6 minutes would have to be used in one month.

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.