Mathematics, 04.10.2020 14:01 gugu1004
Grace starts with 100 milligrams of a radioactive substance. The amount of the substance decreases by 14 each week for a number of weeks, w. She writes the expression 100(14)w to find the amount of radioactive substance remaining after w weeks.
Ryan starts with 1 milligram of a radioactive substance. The amount of the substance decreases by 40% each week for a number of weeks, w. He writes the expression (1 – 0.4)w to find the amount of radioactive substance remaining after w weeks.
Use the drop-down menus to explain what each part of Grace’s and Ryan’s expressions mean.
Grace’s Expression: 100(14)w
100:
14:
w:
(14)w:
Ryan’s Expression: (1 – 0.4)w
1 – 0.4:
w:
0.4:
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