the heart rate of a person beginning an exercise routine starts at 60 beats per minute. At the peak of the workout 20min later, the heart rate is 160.25min after the peak of the workout, the persons heart rate drops back down to 60.What is an appropriate domain for this function?why?

For what values of x is x2 + 2x = 24 true?

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.