Calculus i related rates:
an airplane is flying at an altitude of 5 miles and passes directly over a radar antenna (see figure). when the plane is 10 miles away (s = 10), the radar detects that the distance s is changing at a rate of 240 miles per hour. what is the speed of the plane?

Astudy claims that the mean age of online dating service users is 40 years. some researchers think this is not accurate and want to show that the mean age is not 40 years. identify the null hypothesis, h0, and the alternative hypothesis, ha, in terms of the parameter μ. select the correct answer below: h0: μ≥40; ha: μ< 40 h0: μ≤40; ha: μ> 40 h0: μ≠40; ha: μ=40 h0: μ=40; ha: μ≠40