Answer: It’s how the post office know which zone to drive to and how to sort it better
Explanation:
Answer:
5
Explanation:
15 minus the product of 5 times the difference of p minus 6
Writing expression:
15 - [5 x (p -6)]
Since p = 8, insert the parameters and solve;
15 - [5 x (8 - 6)]
= 15 - (5 x 2)
= 15 - 10
= 5
Set this up as
10 = 40 (1/2)t/28
and solve for t in years.
10/40 = (1/2)t/28
log(0.25) = (t/28) log(0.5)
t = 28 log(0.25) / log(0.5) years = 56 years
Test the answer:
56 years = 2(28 years) = 2 half-lives, so the remaining amount should be 1/2 of 1/2 of the initial amount, i.e. 1/4 of the initial amount, and 10 mg = 1/4 of 40 mg.
