Marcus spent $3.25 to wash his car. if one quarter operates the car wash for 60 seconds, how long did it take him to wash his car? explain what you did. a. 10 minutes b. 13 minutes c. 16 minutes d. 32.5 minutes

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Which expression gives you the distance between the points (5,1)and(9,-6)