An element with mass 590 grams decays by 19.5% per minute. How much of the element is remaining after 15 minutes, to the nearest tenth of a gram?

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right

answer: 5/2     2 1/2

step-by-step explanation:

5/2              

5 goes into 2 two times so its 2 and 1/2