Divide 26 in the ratio 4:5:4

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

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 =