What sentence about markdowns and markups is true? ( provide an explanation for your selected answer choice, this way i'm more clear on the concept.)

a) markdowns and markups have no limit.
b) a markdown has no limit, but a markup is limited to 100% or less.
c) a markup has no limit, but a markdown is limited to 100% or less.
d) markdowns and markups are limited to 100% or less.

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

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.