Samuel orders dvd’s from an online music store. each dvd costs $9.99. he has a 20% discount code, and sales tax is 6.75%. what is the total cost of his order?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction