Angela used 25 cups of flour to make 5 batches of lemon cookies. She used 12 cups of flour to make 3 batches of vanilla cookies. Which type of cookie uses more flour?

If a =6, what is the value of 2a(3b + 5c)?

What is the y intercept of f(x)=(1/2)^x?

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 =