Answer:
2,674.14 g
Step-by-step explanation:
Recall that the formula for radioactive decay is
N = N₀ e^(-λt)
where,
N is the amount left at time t
N₀ is the initial amount when t=0, (given as 42,784 g)
λ = coefficient of radioactive decay
= 0.693 ÷ Half Life
= 0.693 ÷ 18
= 0.0385
t = time elapsed (given as 72 years)
e = exponential constant ( approx 2.7183)
If we substitute these into our equation:
N = N₀ e^(-λt)
= (42,787) (2.7183)^[(-0.0385)(72)]
= (42,787) (2.7183)^(-2.7726)
= (42,787) (0.0625)
= 2,674.14 g
Emily’s weekly allowance would be $7.
B. This is the answer because it is not equivalent to anything else, and the answer simplified is: -18.
67592 meters in 2 weeks....2 weeks = 14 days....67592 / 14 = 4828...so he ran 4828 meters per day.
4828 + 1607.87 = 6435.87 meters for that day <==
The answer is 393.5
Estimate it to 800 divided by 2
