Acandy bar takes an average of 3.4 hours to move through an assembly line. if the standard deviation is 0.5 hours, what is the probability that the candy bar will take between 3 and 4 hours to move through the line? . a: .2119 b: .2295 c: .6731 d: .3270 e: .8849. 2. the average noise level in a diner is 30 decibels with a standard deviation of 6 decibels. 99% of the time, the noise level is below what value? . a: 16.04 b: 30.00 c: 36.00 d: 43.96 e: 48.00.

What makes a trapezoid an isosceles trapezoid?

Suppose that the function f is defined. , for all real numbers, as follows. _ \ 1/4x² -4 if x≠ -2 f(x)=< /_-1 if x=-2 find f(-5), f(-2), and f(4)

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?