Identify the class midpoints for the given frequency distribution.
weight (lbs) frequency
200-204
205-209
210-214
12
215-219
36
87
28
220-224
225-229
230-234
235-239

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

Which of the following vectors are orthogonal to (2,1)? check all that apply

Robert is placing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod costs y dollars per square foot