Aresearcher is interested in the cholesterol levels of adults in the city in which she lives. a free cholesterol screening program is set up in the downtown area during the lunch hour. individuals can walk in and have their cholesterol levels determined for free. one hundred and seventy three people us the service, and their average cholesterol is 217.8. the sample obtained is an example ofa. a simple random sample, since the experimenter did not know beforehand which individuals would come to the screening. b. a stratified sample of high and low cholesterol individuals. c. a sample probably containing bias and undercoverage. d. a multistage sample of varying cholesterol levels.

alternative A.

Step-by-step explanation: Since the individuals that are participating in this survey are not chosen by any means, the sample that is being analyzed is simple and random, so the experimenter couldn't know beforehand who would come to the test.

1. when "a" is a root of a polynomial, (x -a) is a factor of it. for the three roots given, the factors of the desired polynomial are (x +2)(x -1/2)(x -3).

in order to make the leading coefficient be negative, we need to multiply this product by a negative number. any negative number will do, but we choose a small (magnitude) value that will eliminate the fraction: -2.

then

f(x) = -2(x +2)(x -1/2)(x -3) = -(x +2)(2x -1)(x -3)

= -(2x² +3x -2)(x -3)

= -(2x³ -3x² -11x +6)

f(x) = -2x³ +3x² +11x -6

2. a graph created by the desmos on-line graphing calculator is shown, and the zeros are highlighted.

3. as indicated in part 1, the multiplier of this equation can be anything and the zeros will remain the same. you want a negative leading coefficient, so the "anything" is restricted to any of the infinite number of numbers that will make that be the case.

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;