Write a linear equation that expresses the cost, y, in terms of the number of cups of coffee, x.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

What is the domain of the step function f(x)=[2x]-1?