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Zinaida [17]
3 years ago
12

-(-5.6g + 2h – 9) Does anyone know this ?

Mathematics
1 answer:
n200080 [17]3 years ago
5 0

Answer:  5.6g - 2h + 9

Explanation:

Flip the sign of each term inside the parenthesis.

  • The -5.6g becomes +5.6g or simply 5.6g
  • The +2h becomes -2h
  • The -9 becomes +9

These sign flips occur because of the negative out front the parenthesis. It's the same as having -1 outside, and we distribute the -1 through.

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Answer:

  19.44 hours, about 19 hours 26 minutes

Step-by-step explanation:

The exponential equation that describes your caffeine level can be written as ...

  c(t) = 120·(1 -0.12)^t . . . . where t is in hours and c(t) is in mg

We want to find t for c(t) = 10, so ...

  10 = 120(0.88^t)

  10/120 = 0.88^t . . . . . . . divide by 120

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  t = log(1/12)/log(0.88) ≈ 19.4386

It will take about 19.44 hours, or 19 hours 26 minutes, for the caffeine level in your system to decrease to 10 mg.

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3 years ago
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Natali5045456 [20]

Answer:

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Step-by-step explanation:

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2 years ago
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timurjin [86]
The answer would be 3. 
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