Sophie drove 225 miles south through the smoky mountains. snow during her return trip made her average speed on return trip 30 mph slower. the total driving time was 8 hour. find sophie' s average speed on each part of the trip.

What is the value of r of the geometric series?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is