Ineed with problems 7-18 i need it done asap ☹️

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

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Find the cosine function that is represented in the graph.