Can someone please help me 11 a &b and 12 a & b and put the steps if possible, if not just please tell me the answer

when the daily mileage is greater than 40 miles, unlimited mileage plan will save you money. 40 miles is the break-even point.

step-by-step explanation:

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be

the answer to this in exact form is 4/35 but in decimal form its 0.1142857

hope this if needed hmu