19. Amy runs a bike rental business. She currently charges $36 per bike rental and
averages 60 rentals a week for an average weekly income of $2,160. She
predicts that she may lose 2 rentals a week for every one-dollar increase in the
rental price, p.
Amy writes the expression - 2p? - 12p+2160 to model her prediction. Which
of the following is the equivalent expression to reveal the maximum income
based upon Amy's model?
A. -2(0+3)2 +2178
6.-260+6)* + 2160
c. -21p-3)2 +2178
D. -2(0-6) +2142

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Find the values of y: 3y^3(y^2+ 2/3y)=0

Need now 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.