18. A laboratory tested a simple random sample of twelve chicken eggs and found that the data fit a nomal distribution and that mean amount of cholesterol was 225 milligrams with ans = 15.7 milligrams. Find the margin of error and confidence interval that corresponds to the given statistics and a confidence level of 95%. A E= 10.0354, CI = (212.0226, 237.9236) C) E= 6.2246, CI = (218.3254, 238.6984) B) E = 2.2546, CI = (216.0652, 233.9652) D) E= 9.9753, CI = (215.0247,234.9753)​

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sorry if this isnt what you're looking for i dont really understand the question

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

the answer is 99.