Tim worker is doing his budget. he discovers that the average electric bill for the year was $206 with a standard deviation of $10.00. what percent of his expenses in this category would he expect to fall between $184.00 and $200.00? the z for $184.00 = - .62.22 . the percent of area associated with $184.00 = 62.2 %. the z for $200 = - .622.22 . the percent of area associated with $200 = 48.6 %. subtracting the two percentages, the percent of expenses between $184.00 and $200.00 is 622.22

We use the z score formula:

z = (x – u) / s

Find z at x = 184 and x = 200 then use the standard tables to find for the P value using right tailed test.

at x1 = 184

z1 = (184 – 206) / 10 = -2.20

From the tables, P1 = 0.9861

at x2 = 200

z2 = (200 – 206) / 10 = -0.60

From the tables, P2 = 0.7257

So the probability it falls from 184 to 200 is:

P = 0.9861 – 0.7257

P = 0.2604 

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explanation

the graph has a slope of 1/3 because each time you move up 1, you go to the right 3. so, slope = rise/run = 1/3. we can cross choice a off the list since we want a slope of 3, rather than 1/3.

the first table shown has a slope of -3. this is because the rise is -6 and the run is 2, so slope = rise/run = -6/2 = -3. note how x increases by 2 each time (run) and y drops by 6 each time (rise). choice b can be eliminated.

the second table has a slope of 3. each time x goes up by 1, the y values increase by 3. slope = rise/run = 3/1 = 3. alternatively you can use the slope formula to prove that the slope is 3 here. use any two rows of values to generate the two points. choice c is one of the answers

the third table also has a slope of 3. let's use the slope formula to prove as such. i'm going to use the first two rows of the table. so i'll use the two points (2,1) and (5,10)

m = slope

m = (y2-y1)/(x2-x1)

m = (10-1)/(5-2)

m = 9/3

m = 3 so we get a slope of 3

choice d is the other answer

the answer is c hope it

step-by-step explanation: