Answer:
16.75622173 grams.
Step-by-step explanation:
21.8% + 78.2% = 100%
There is 78.2% of the original remaining each minute.
670g * 0.782^15
It's to the power of 15 because it's done 15 times.
16.75622173 grams are remaining.
Answer:
After 15 minutes 16.75 g are remaining
Step-by-step explanation:
After each minute, the amount remaining is 100 - 21.8 = 78.2% = 0.782 times as much as was present at the start of the minute. So after 1 minute there is 670*0.782 = 523.94 g. After 2 minutes there is 523.94*0.782 = 409.72 g, which is equivalent to 670*0.782^2. Then the general formula is:
m = 670*0.782^t
where m is the mass remaining (in grams) and t the time elapsed (in minutes)
After 15 minutes:
m = 670*0.782^15 = 16.75 g
