Find two consecutive whole numbers that square root 105 lies between.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Ihave trouble finding the nth term of a linear sequence

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 =