Intru-nu triunghi dreptunghic abc, m(a)=90 se ia un punct oarecare m e [bc] si se duc me perpendicular pe ab, e e (ab) si mf perpendicular pe ac, f e (ac).fie n=sim lui m fata de e. aratati ca: a)punctele p, a,n sunt coliniare; b)triunghiul pmn este dreptunghic

Sandy works at a clothing store. she makes $7 per hour plus earns 15% commission on her sales. she worked 75 hours over the last two weeks and had a total of $2,566 in sales before taxes. which of the following is closest to how much she will earn in hourly wages and commission for those two weeks?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Bring the fraction a/a-4 to a denominator of 16-a^2