You and your friends are in an ice skating race. you skate at a rate of 12 feet per second. your friend skates at a rate of 10 feet per seconds and has a head start of 20 feet.
a. how long will it take you to catch up to your friend?
b. the entire race is 180 feet. how far ahead of your friend will you be when you cross the finish line?

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

How do you find the circumfrance of a circle?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.