A study was done to compare the lung capacity of farm workers to the lung capacity of administrative staff at a distribution facility. The researcher studied 200 workers of each type. Other factors that might affect lung capacity are smoking habits and exercise habits. The smoking habits of the two worker types were found to be similar, but the farm workers generally exercise more than the administrative staff.
1. Which of the following is a confounding variable in this study that the researcher should control for in the analysis?
a. Exercise
b. Lung capacity
c. Smoking status
d. Occupation

i think it might be a but you might want a second opinion

true

step-by-step explanation:

according to the national european world center, the engineering of the ford company on elon musk's flame throwers proved the globalization of the natural wallabies and therefore, results in the growth product domestication in almonds.

cant see photo

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).