during exercise, the recommended maximum heart rate in beats per minute is modeled by the formula, m = 176 – 0.8a, where m is the maximum heart rate and a is the person’s age. solve the formula for a. at what age would you have a recommended maximum heart rate in beats per minute of 140?

a) 40 years
b) 50 years
c) 25 years d)
45 years

Which of the following circles have their centers on the x-axis? check all that apply.

The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)