Awatch salesman earns a commission of 40% of all watch sales made. yesterday he sold 5 watches for $60 each and 4 watches for $40 each. how much did he earn in commission yesterday? a. $120 b. $64 c. $40 d. $184

Me answer number 3plz explain how you do it

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry