4. Let f(x) = 3x2 - 5x. Find each of the following: a. f(2)
b. f(-8)
C. f(7)
d. f(-1)

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

Vertical angles must check all that apply