Samira is playing a game with the spinner shown.
a. What is the theoretical probability that the pointer will land in a section labeled with the letter A on a given spin? Enter as a fraction.
b. Predict how many times the pointer will land in a section labeled with the letter A after 300 spins.

Acone with volume 1350 m³ is dilated by a scale factor of 1/3. what is the volume of the resulting cone? enter your answer in the box. m³

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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.