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3 years ago

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Element X is a radioactive isotope such that every 40 years, its mass decreases by half. Given that the initial mass of a sample

of Element X is 110 grams, how much of the element would remain after 29 years, to the nearest whole number?

1 answer:

lisabon 2012 [21]3 years ago

3 0

Answer:67 or 66.549674907

Step-by-step explanation:

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-13/5 is between -1 and -2.<br> True<br> False

Ahat [919]

Answer:

It is False.

Step-by-step explanation:

-13/5 = -2.6

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3 years ago

Round 123.1867 to the nearest thousandth

zvonat [6]

Answer:

123 is the nearest value

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3 years ago

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Rápido y fácil, trigonometría. Urgente porfavor

enot [183]

Answer:

The angle $\theta$ measures approximately $28.81^o$

Step-by-step explanation:

Since this problem involves the finding of an angle in a right angle triangle for which we know the opposite side and the adjacent side, the trigonometric function that relates them is the tangent:

$tan(\theta)=\frac{opposite}{adjacent}$

Then, for our case we get a starting equation that reads:

$tan(\theta)=\frac{opposite}{adjacent} \\tan(\theta)=\frac{7.7}{14}$

and for which we need to solve for $\theta$ . Then we use the arctangent function to get the final answer:

$tan(\theta)=\frac{7.7}{14} \\\theta=arctan(\frac{7.7}{14})\\\theta= 28.81^o$

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3 years ago

Which is not a benefit for direct deposit?

vampirchik [111]

C. You can plan when you a paying bills.
I think this is the answer because it does not have a direct correlation to direct deposits to me.

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3 years ago

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Two planes leave an airport at noon. If the eastbound plane flies at 660 mph and the westbound plane flies at 600 mph, at what t

Eddi Din [679]

I'm guessing that they took of in the same airport.

Each hour they will separate by 1260 miles or 21 miles each minute

2,000/21 = 95.23 minutes which is 1 hour and 35 minutes

Hope this helps :)

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3 years ago