You remember from SOH CAH TOA that
.. Cos = Adjacent/Hypotenuse
.. cos(C) = 80/82 = 40/41 . . . . . . . . . . . seems to match the last selection
This is the inverse of f(x)= -3 - (-2)
Question 6: $38.82
question 7: t=5w
question 8: which blood type does the leaf number of people have
20 pounds of lollipops. 20 x .95 = 19, 10 x 1.1 = 11. sorry i'm awful at explaining math.