PLS ANSWER I WILL GIVE BRAINLIEST JUS PLS HELP ME THIS IS DUE VERY SOON

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

What is the total surface area of this square pyramid?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.