2 years ago

What does about mean in a math problem?

Mathematics

1 answer:

damaskus [11]2 years ago

7 0

Mean means the average.

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Which of the following options have the same value as 20% of 45?

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Answer:

$B. \: \frac{1}{5} \cdot 45$

$E.\: 0.2 \cdot 45$

$D. \: \frac{20}{100}\cdot 45$

Step-by-step explanation:

% means /100

$20\% = \frac{20}{100} \\\\20/100 =0.2\\= 0.2\cdot 45\\\\\frac{20}{100}=\frac{1}{5} \\\\= \frac{1}{5} \cdot 45$

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<span>A machine needs 2 of its gears replaced. You find 2 gears, one manufactured 5 years ago and the other manufactured 10 years ago. The specifications sheet says that the chance of failure is 5% after 5 years and increases to 8% after 10 years. If the gears on the machine are in no way linked to each other, what are the chances that both will fail? Answer in % form.
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A population of rodents increases exponentially at a rate of 7.5% per year. What is the equivalent monthly rate to the nearest h

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The answer is 1.6%

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