I REALLY need help with this question please.

Question

asked Mar 25, 2022 125k views

2 Answers

Deividas · Answer 1 · 2022-03-28T02:12:14+0000

Answer:

375

Explanation:

because if you look at the question 3\4 is 1 hour with the aspren 500 after 2 hours you 2 the ammount i think

Barndog · Answer 2 · 2022-03-30T10:34:43+0000

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Work Shown:

Plug in t = 2 and we get the following

$a = 500*\left((3)/(4)\right)^(t)\\\\a = 500*\left((3)/(4)\right)^(2)\\\\a = 500*\left(0.75\right)^(2)\\\\a = 500*0.5625\\\\a = 281.25\\\\$

The answer is choice D. There are 281.25 mg of aspirin in the bloodstream after 2 hours.

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Side notes:

The 500 represents the initial amount of aspirin (in mg) in the bloodstream. This is the amount when t = 0.
The 3/4 converts to 0.75; when solving 1+r = 0.75, we get r = -0.25, and this shows a 25% reduction in aspirin each time t goes up by 1. Every hour, the amount of aspirin in the bloodstream reduces by 25%