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slega [8]
3 years ago
8

Select the correct answer.

Mathematics
1 answer:
zvonat [6]3 years ago
6 0

Answer:

C

Step-by-step explanation:

Have a nice day

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How long should a person take to travel 2000m at an average speed of 5m/s
zimovet [89]

Answer:

400

Step-by-step explanation:

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3 years ago
Divide mentally 3,200/80=
uysha [10]
It is 40 40. 40 is the answer


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Read 2 more answers
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
Find the exact area of an equilateral triangle if the length of one side is 40
VARVARA [1.3K]
Equilateral triangle is a triangle with the 3 sides of the same length, and the 3 angles with the same measures/degree.
The formula to find the area of a triangle is base x height/2 , you do have the base (40), but you need the height. To find the height of an equilateral triangle you use the formula: side/2 x radical3, this way u'll find the height and therefor can calculate the area of the triangle.
Hope that helped :)
8 0
3 years ago
(ii) The bearing of R from Q is
sveticcg [70]
Answer:

RQ is equals to RQ



Explanation:



i took the test
8 0
3 years ago
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