In rt. ∆ADC, if DM is the median, then: (i) AD^2+CD^2=AM^2+DM^2
(ii) AD^2+CD^2=3(AM^2+DM^2)
(iii) AD^2+CD^2=2(AM^2+DM^2)
(iv) AD^2+CD^2=4(AM^2+DM^2)​

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project