Plz help me!?!?

and thank u

Me. i need an answer asap. , you! select the correct answer from each drop-down menu. simplify the given polynomial and use it to complete the statement. the polynomial simplifies to an expression that is a blank with a blank degree of blank .

Multiply. write your answer in simplest form. 3/8 x 5/7

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 =