A DVD player is regularly priced at $79.95 and is on sale for 30% off. What is the amount of the discount?

Which rational number could be graphed between -4 and -5

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

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 =