A sprint duathlon consists of a 10km run and a 20km bike ride. The mean finish time of all participants in a recent duathlon was 1.67 hours with a
standard deviation of 0.25 hours.
Suppose ONE random sample of 30 participants yielded a mean finishing time of 1.59

hours with a standard deviation of 0.30 hours.
Amongst ANY 30 randomly sampled participants, what is the probability that the sample
mean finishing time exceeded 2 hours?
O very close to O
O .09510
0.90490
O can't say

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size. it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree

Find the area between y=e^x and y=e^2x over [0,1]