1. The average monthly cable TV rate was modeled over several years by the function, R(t) =-0.00368 +0.13+ - 0.073t+ 7.7 , where R(t) is the monthly rate in dollars and t is
years.
goo
a) What is the average monthly cable rate in year 20?
b) In what year is the average monthly cable rate peak at its highest?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.