An efficiency study conducted for elektra electronics showed that the number of space commander walkie-talkies assembled by the average worker during the morning shift t hr after starting work at 8 a. m. is given by n(t) = −t3 + 6t2 + 15t (0 ≤ t ≤ 4).
a. find the rate at which the average worker will be assembling walkie-talkies t hr after starting work.
b. at what rate will the average worker be assembling walkie-talkies at 10 a. m.?
c. how many walkie-talkies will the average worker assemble between 10 a. m. and 11 a. m.?

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

The box plot shows the number of raisins found in sample boxes from brand c and from brand d. each box weighs the same. what could you infer by comparing the range of the data for each brand? a) a box of raisins from either brand has about 28 raisins. b) the number of raisins in boxes from brand c varies more than boxes from brand d. c) the number of raisins in boxes from brand d varies more than boxes from brand c. d) the number of raisins in boxes from either brand varies about the same.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.