It is desired to estimate the average time it takes statistics students to finish a computer project to within two hours at 90% reliability. it is estimated that the standard deviation of the times is 14 hours. how large a sample should be taken to get the desired interval? a) n = 189 b) n = 133 c) n = 325 d) n = 231

The point (-7, -24) is on the terminal ray of angle 0 which is in standard position. a student found the six trigonometric values for angle e. the student's answers are shown. which value(s) are incorrect? sin(8) cos(8) 24 tan(0) sin(0)=25 cos(0) -- tan(ⓡ) - - 24 csc(o)=2 sec(0) --25 cot(6) - za csc(o) sec(0) cot(0) done