The function f(x) = 3x + 5,000 represents the amount of money a cell phone screen is being sold for, where x is the number of screens being manufactured.

The function g(x) = 20x − 400 represents the cost of production, where x is the number of screens being manufactured.

What is (f − g)(200)? Explain.

$2,000 is the profit made from 200 cell phone screens.
$9,200 is the profit made from 200 cell phone screens.
$2,000 is the cost of manufacturing 200 cell phone screens.
$9,200 is the cost of manufacturing 200 cell phone screens.

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Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.