Which relation is a function? a. {(1, −1), (−2, 2), (−1,  2), (1, −2)} b. {(1, 4), (2, 3), (3,  2), (4, 1)} c. {(1, 2), (2, 3), (3,  2), (2, 1)} d. {(4, 2), (3, 3), (2,  4), (3, 2)}

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?