What's a rule about a line tangent to a circle?

Charlie is a car salesman he earns $800 plus a 9% commission on all of her sales for the week if charlie receive the payment for $1960 this week how much where is total sales

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?