The rocky mountain district sales manager of rath publishing inc., a college textbook publishing company, claims that the sales representatives make an average of 43 sales calls per week on professors. several reps say that this estimate is too low. to investigate, a random sample of 29 sales representatives reveals that the mean number of calls made last week was 44. the standard deviation of the sample is 4.1 calls. using the 0.050 significance level, can we conclude that the mean number of calls per salesperson per week is more than 43?

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5050 i think

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c.   x=2.4cm

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similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

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to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

50x5=$250

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