Greenville Middle School decided to take their 6th grade students on a field trip to the Science Museum in Raleigh. The Museum have a capacity
of 2500 people and Greenville Middle School has a total of 850 students.
The ratio of girls to boys in the 6th grade is 3:4. If there are 60 girls in the
6th grade, how many students at Greenville middle school are 6th
graders?

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

What is the slope of the line shown below?

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.