Question

n element with mass 570 grams decays by 18% per minute. How much of the element is remaining after 13 minutes, to the nearest 10th of a gram?

Answer 1

Explanation:

Exponential Functions:

y=ab^x

a=starting value=570

r=rate=18%=0.18

Exponential Decay:

b = 1 - r = 1 - 0.18 = 0.82

Write Exponential Function: put it all together

y=570(0.82)^13

Plug in time for x:

y=570(0.82)^13

y=43.197134 evaluate

ANSWER: y≈43.2 round