Find the standard deviation of this set of data 15,21,15,20,19 round to the nearest thousandth as needed

Choose a second initial value that is 0.01 greater than the initial value from question 9. iterate it using the function, f, ten times. if necessary, you can round your results to the nearest ten-thousandth.

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?