Can anyone me with this question? a poll has a percent error of 4%. the poll states 15,000 people will vote for candidate a in the next election. which statement describes what the actual number of people voting for candidate a could be? a. the actual number of people is either 9,000 or 21,000. b. the actual number of people is either 14,400 or 15,600. c. the actual number of people is either 14,423 or 15,625. d. the actual number of people is either 14,940 or 15,060.

B

Step-by-step explanation:

Percent error of 4% means that the actual number would be either 4% less or 4% more than what it states.

So what is 4% of the stated 15,000?

So the actual could be 15,000 + 600 = 15,600, or 15,000 - 600 = 14,400

Answer choice B is right.

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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rauschg

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