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nataly862011 [7]
3 years ago
9

I don't know how to do this?

Mathematics
1 answer:
Andre45 [30]3 years ago
6 0
What is it? I will help u if I knew what it is.
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Carlos has taken an initial dose of a prescription medication.
Marat540 [252]

Answer:

3.48 hours

Step-by-step explanation:

The equation is:

M(t)=20 e^{-0.86t}

Where

M(t) is the amount of medication remaining in mg

t is the time it takes, in hours

The questions asks HOW LONG it will take to make the remaining medication to 1 milligrams (1 mg)??

We have to substitute M(t) with "1" and find the corresponding value of "t". We will use natural log to solve this. Shown below:

M(t)=20e^{-0.86t}\\1=20e^{-0.86t}\\0.05=e^{-0.86t}\\Ln(0.05)=Ln(e^{-0.86t})\\Ln(0.05)=(-0.86t)Ln(e)\\t=\frac{Ln(0.05)}{-0.86}\\t=3.48

<u>Note: </u> Ln(e) = 1

This means, the amount of time it will take is about 3.48 hours

8 0
3 years ago
I need assistance!!!!
erastovalidia [21]

Answer:

Step-by-step explanation:

Because midpoints were used to make similar triangles we can say

AC=2(DE)

5x+12=2(9x-20)

5x+12=18x-40

-13x+12=-40

-13x=-52

x=4

AC=5x+12

AC=5(4)+12

AC=20+12

AC=32

3 0
3 years ago
Read 2 more answers
Hi i need a lil help 6(x + 4) = 48 x=
valkas [14]

Answer:

x=4

Step-by-step explanation:

6(8) = 48

4 0
3 years ago
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3. A teacher made a copy of a map. To make the map easier to see, the teacher enlarged the area of the map by 38%. Let d represe
____ [38]

Answer:

1.38d

Step-by-step explanation:

4 0
3 years ago
A football team lost 9 yards on each of two consecutive plays. represent the total change as a product of sun numbers and then f
dexar [7]
2(-9)=-18
Do the total list is -18 yards
7 0
3 years ago
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