In the year 1997, the surface elevation of Lake Powell was 3845 feet above sea level. In the year 2002, the surface elevation of Lake Powell was 3459.5 feet above sea level.
Interpret the rate of change in this situation.
The surface elevation of Lake Powell is decreasing or increasing?
at the rate of? and is it feet, years, feet per year, or feet every 5 years?

If a || b and e || f , what if the value of y ?

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.

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?