Circle 1 has a radius of 9 inches and a central angle 8 that intercepts an arc length of 6 inches. Having the same central angle 8 as Circle 1, what is the arc length of Circle 2 with a radius of 3 inches?

Find the domain of the following expression: 1/(√x)-2

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =