john left home and drove at the rate of 45 mph for 2 hours . he stopped for lunch then drove for another 3 hours at the rate of 50 mph to reach his destination . how many miles did john drive ?
the total distance d traveled by john is given by d = 45 * 2 + 3 * 50 = 240 miles . answer c
add(multiply(45, 2), multiply(3, 50))