An element with mass 670 grams decays by 27.3% per minute. how much of the element is remaining after 9 minutes, to the nearest 10th of a gram?

38.0 grams

Step-by-step explanation:

The exponential decay equation with rate of decay r in time period x is given by :-

, A is the initial value .

Given: The initial mass of element=  670 grams

Rate of decay= 27.3%=0.273

Now, the function represents amount of element after x minutes is given by ;-

Now, the function represents the amount of element after 9 minutes is given by ;-

Hence, 38.0 grams of element remains after 9 minutes.

it should be a and d. lmk if i'm wrong xd

the 4th choice is the correct one

step-by-step explanation: