An element with mass 290 grams decays by 13.2% per minute. How much of the
2 answers:
Answer:
40.0 grams
Step-by-step explanation:
An exponential decay function is
.... (1)
where, a is initial value, t is time and r is decay rate.
It is given that element with mass 290 grams decays by 13.2% per minute.
Initial value = 290
Decay rate = 13.2% = 0.132
Substitute a=290 and r=0.132 in equation (1).
Substitute t=14 to find the amount of element remaining after 14 minutes.
Round the solution to the nearest tenth.
Therefore, element with mass 40.0 grams is remaining after 14 minutes.
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ANSWER
The smaller angle is
.EXPLANATION
Let the angles be
where y is the smaller angle.
Since they are supplementary, they will add up to 180°.
This implies that,
If one angle is 4 times the other, we can then write the following equation,
We put equation (2) into equation (1) to get,
We divide through by 5 to obtain,
This implies that,
The smaller angle is
.EXPLANATION
Let the angles be
where y is the smaller angle.
Since they are supplementary, they will add up to 180°.
This implies that,
If one angle is 4 times the other, we can then write the following equation,
We put equation (2) into equation (1) to get,
We divide through by 5 to obtain,
This implies that,