The amount (in percent) of a drug in a person's bloodstream h hours after its injection can be approximated using the functional rule

A (h) 5h/4h²+5

Find the approximate amount of drug in a person's
bloodstream after it is injected past 3 and a half hours.

32.41%

Step-by-step explanation:

f (h) =

f (3.5) = 5(3.5)/4 (3.5)^2 +5

f(3.5) = + 5

f(3.5) = 0.3241

0.3241 x 100 = 32.41%

36

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!