Suppose a line l has an equation ax+by+c==0, what is the slope of l if b=0 and a does not equal 0

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

This question awards 100 ! i really don’t want to fail i will also mark you !

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 =