Mathematics, 18.05.2021 20:10 jazmyn101
The half-life of an isotope is 20 years. A sample initially contains 100 grams of the isotope. The function that predicts the amount of isotope present in the sample ( A ) as a function of time in years ( t ) is A = 100 ( 2 β t 20 ) . Which graph below represents this function?
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Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (β3)Β·(β2x) + (β3)Β·(4) step 2: 12 + 6x + (β12) step 3: 12 + (β12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition
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Mathematics, 21.06.2019 21:00
Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1β0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.
Answers: 1
The half-life of an isotope is 20 years. A sample initially contains 100 grams of the isotope. The f...
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