A used-droid dealership buys a droid for $2900 and then sells it for $3900. What is the percent increase?
1 answer:
Answer:
The percent increase is 34.48276%
Step-by-step explanation:
we are given
original price =$2900
new price =$3900
now, we can find change in price
change in price = (new price)-(original price)
change in price =3900-2900
change in price =1000
percent increase = (change in price)/(original price) *100
percent increase is
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About 92 days are taken for 90 % of the material to <em>decay</em>.
The mass of radioisotopes (), measured in milligrams, decreases exponentially in time (
), measured in days. The model that represents such decrease is described below:
(1)
Where:
- Initial mass, in milligrams.
- Current mass, in milligrams.
- Time constant, in days.
In addition, the time constant is defined in terms of half-life (), in days:
(2)
If we know that ,
and
, then the time required for decaying is:
About 92 days are taken for 90 % of the material to <em>decay</em>.
We kindly invite to check this question on half-life: brainly.com/question/24710827