Typing speed the function w(t)=-3.75t^2+30t+40 describes a typist’s speed (in words per minute) over a time interval [0, 5].
a. find w(0).
b. find the maximu w value and the time t when it occurs.
c. find the average speed over [0, 5].

Which function has the domain x> -11?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)