What effect does adding a linear function to an exponential or logarithmic function have on the graph?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

If you answer 2+2 you will get over 80 points

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?