Pure acid is to be added to a \(20\%\) acid solution to obtain 28 L of a \(40\%\) acid solution. What amounts of each should be used?

Sleep: Mean 7.35 and Range \(5.5-8.8\) Light physical activity: Mean 8.71 and Range \(3.0-16.0\) Moderate physical activity: Mean 3.36 and Range \(0.71-8.3\) Hard physical activity: Mean 0.78 and Range \(0-4.1\) Very hard physical activity: Mean 0.14 and Range \(0-1.05\) On the average. how many hours per day did the women sleep?

Suppose that f is an exponential function with percentage growth rate of 5% and that \(f(0) = 4\). Find a formula for f(x).

Let L be an SList. Define a recursive function Wham as follows. B. Suppose L = x. Then Wham\((L) = x \dot\mid x. R.\) Suppose L = (X, Y). Then \(Wham(L) = Wham(X) + Wham(Y)\). Evaluate Wham (2, 4), (7, 9) , showing all work.