Quadratic functions g and k are showed below
g (x)=5x^2-12
k (x)=5x^2+c
for what value of c will the graph of k be 9 units above the graph of g?

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

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.