Mr. Brust and Mr. Kelly have invested some of their money in the stock market, which had been fluctuating over time. The projected value of Mr. Brush’s assets after t years is t^3 + 2t^2 - 3t +400. Mr. Kelly’s projected assets after t years is t^4 - 5t^2 + 100. a) how much did each of them invest? b) what is their combined wealth after 7 years? c) what is their combined wealth after t years?

it has the same slope and a different y-intercept

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don't report but were is the digram

step-by-step explanation:

the answer is 3/2 and for decimal: 1.5

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-lavira: )

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.