Which one of the following statements is best?

(a) the level of safety stock maintained decreases when the standard deviation of demand during lead-time increases.
(b) the level of safety stock maintained is greater if mean absolute deviation (mad) is used rather than standard deviation in estimating forecast errors.
(c) the level of safety stock maintained decreases when the desired cycle-service level increases.
(d) when no safety stock is maintained, stockouts will occur during approximately 50% of the cycles.

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

a mantle plume is an upwelling of abnormally hot rock within the earth's mantle. as the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of volcanic centers known as hotspots and probably also to have caused flood basalts.

step-by-step explanation:

it is rigid.; it is isometric. ; the size is preserved.

step-by-step explanation:

a translation is called an isometry; these are transformations that preserve congruence between pre-images and images.

they are also called rigid transformations, as the only thing that can happen to a pre-image is that it is moved or turned, not stretched or shrunk.

since congruence is preserved, the size is preserved.

answer is  

d.

3.09

hope you got this right.