Fill in the blank. х
If (x, y) is any point other than the origin on the terminal side of an angle a in standard position and r= 1x? +
then
and- =
r

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Julian wrote the following numeric pattern on the board3,10,17,24,31,38.what numbers of julian's pattern are compound numbers.