I’LL MARK YOU AS BRAINLIEST BUT PLS ANSWER What is a valid inference? Use the dip-down menus to explain your answer.

A valid inference is one that is true about the based on a .

Drop-down menu #1:
Sample
Data
Example
Population

Drop down menu #2:
Representative sample
Single example
While population
Data point

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.