An on-demand publisher charges $20.50 to print a 700 page book and $18.50 to print a 500 page book. find a linear function which models the cost of a book c as a function of the number of pages p. interpret the slope of the linear function and find c(0).

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.