cameronchilders
10.02.2021 •
Mathematics
Martha surveyed 200 students at her school about
the number of hours they spend
studying each day. The mean of the sample was 3.7 with a standard deviation of 0.46.
Martha can be 95% confident that the mean number of hours all the students at the
school are studying every day is 3.7 with what margin of error?
(Use the formula M = 1.96 x
where N is the sample size and s is the sample
standard deviation.)
Solved
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Ответ:
Step-by-step explanation:
Let's say the length is l and the width is w. Since the problem says that the length is "six times the quantity of five less than half its width", we can write the equation:
l = 6 * (w/2 - 5)
Now, the area of a rectangle is of the form: A = lw, where l is the length and w is the width. We can substitute the expression of l above into the equation:
Hope this helps!