Acell phone company charges $40 per month plus a $35 activation fee write an expression for the total cost for m months then evaluate your expression for 10 months of service

For this case, the first thing we must do is define a variable.

We have then:

We write the expression that models the problem:

Then, for 10 months we have:

Substituting values:

an expression for the total cost for m months is:

for 10 months of service:

probability for j is 1/4

while

a is 1/6