Construct to triangle whose sides are 3in., 11/2in., 2in., 23/4in.,31/2in

Cara earns a base pay of $1800 per month at a car dealership plus a commission of 6% of her sales. what are caras total earning in a month in which she sells $40000 worth of merchandise

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of