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3 years ago

What is 74.625 rounded to the nearest tenth?

Mathematics

2 answers:

lesya [120]3 years ago

8 0

74.6 is the answer. You only round up if the previous number is 5 or bigger

butalik [34]3 years ago

4 0

Answer: 74.6

Step-by-step explanation:

To the nearest tenth means having one figure after the decimal point. Since the figure after the tenth is less than 5, we round down.

I hope this helps.

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If caffeine reduces by about 10% per hour, how many hours h does it take for the amount of caffeine in a body to

Mila [183]

Answer:

7 hours

Step-by-step explanation:

Since, the final amount of caffeine formula would be,

$A=P(1-r)^t$

Where,

P = Initial value,

r = rate per period,

t = number of periods,

Here, r = 10% = 0.10, t = h, A = $\frac{P}{2}$

$\frac{P}{2}=P(1-0.10)^h$

$\frac{1}{2}=(0.90)^h$

Taking log both sides,

$log 0.5 = log 0.90^h$

$log 0.5 = h log 0.90$

$\implies h = \frac{log 0.5}{log 0.9}=6.57881347896\approx 7$

Hence, after 7 hours the amount of caffeine in a body to reduce by half.

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3 years ago

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Vadim26 [7]

Answer:

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Step-by-step explanation:

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3 years ago

Samantha and Mia each left Julia’s house at the same time. Mia walked north at 7 kilometers per hour. Samantha ran west at 11 ki

RoseWind [281]

The answer is 13.0 for the distance between Samantha and Mia after 1 hour.
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4 years ago

Read 2 more answers

Solve for x: |1/3-x/4|=7/12

ozzi

Your answer is x={-1, 11/3}

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3 years ago

What is the value of f^-1(21)

elixir [45]

Given that f(x) = 2x + 11: if f(x) = y = 21, then 21 = 2x + 11, and so 10=2x and x=5.

Thus, f(5) = 2(5) + 11 = 21; (5,21) is a point on the graph of f(x).

If that is so (which it is), then (21,5) is a point on the graph of the inverse function, and 5 is the appropriate output value.

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3 years ago