Question

Jillana takes a single dose of medication that remains in her body according to the equation r = 200(0.75)d, where r represents the amount of medication remaining after d days. If Jillana had taken the medication two days earlier, the amount of medication remaining in her system relative to the amount that remains in her system after d      days would be represented using the equation r2 = 200(0.75)d + 4. Which of the following is an equivalent equation?

Answer 1

To find an equivalent equation to r2 = 200(0.75)d + 4, subtract 4 from both sides and divide by 200(0.75). The equivalent equation is d = (r2 - 4)/(200(0.75)).

Step-by-step explanation:

To find an equivalent equation to r2 = 200(0.75)d + 4, we need to isolate the variable on one side of the equation. Starting with the given equation, subtract 4 from both sides:

r2 - 4 = 200(0.75)d

Now divide both sides by 200(0.75):

(r2 - 4)/(200(0.75)) = d

Thus, an equivalent equation is d = (r2 - 4)/(200(0.75)).

Answer 2

i looked at another online and it said letter A. (Not 100% sure)