Question 21 (1 point) Lucy consumes a marijuana cigarette, and immediately her blood serum concentration of delta-9- tetrahydrocannabinol (the main psycho-active component of marijuana) is 9 times greater than blood serum concentrations deemed safe for driving. If the half-life of delta-9-tetrahydrocannabinol is 32 minutes, how many minutes after consumption, is Lucy's blood serum concentration level first low enough so that she is safe for driving? The exponential decay model is A(t) = Age *t. IMPORTANT DISCLAIMER: Don't try/rely on this information whatsoever. Any conclusion(s) you might draw from this test question are neither based in law nor science. -To be clear, this question merely illustrates general properties of an exponential decay model. a) 32 In b) 32 In -32 In Inc) my 32 10 e) In a f) None of (a) through (e) are correctQuestion 22 (1 point) Consider the following piecewise defined function where [] is the greatest integer function. The value of lim f (x) is: a