Simplify the following expression using only positive exponents. ! ?

Can someone me i’m confused. will give brainliest and a whole bunch of points

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.