Select the correct functions. Identify the functions that exhibit a removable discontinuity.

x2 + 4x -21

f(x) =

x2 - 13x+42

x2 - 8x +15

i(x) =

X-5

g(x)=

2x2 -5x + 12

2x+3

(x) =

x + 4

-2x +8

X-3

h(x) =

2x2 + x - 15

k(x) =

2x-5

Look at attachment. has all info needed. need

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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.