Let r be the decay rate (time in minutes) 17 = 20 e^(5r) 0.85 = e^(5r) ln 0.85 = 5r similarly, ln 0.5 = hr ... where h is the half-life, so dividing the 2 equations, ln 0.85 / ln 0.50 = 5r / hr = 5/h h = 5 ln 0.50 / ln 0.85 h = 21.3 min b) 1/20 = 0.05, so ln 0.85 = 5r ln 0.05 = tr t = 5 ln 0.05 / ln 0.85 t = 92.2 min
Answer:
False, False, True, False, True
Step-by-step explanation:
When you divide by a whole number, the answer always come out smaller
When you divide by a fraction, the answer always come out larger
Answer:
B. if F is a fuction then F(2+h)=f(2)+f(h)
Step-by-step explanation:
Answer:
its c .Both equations have the same potential solutions, but equation A might have extraneous solutions.
Step-by-step explanation:
just took the test
Answer:
5a+5b
Step-by-step explanation:
Multiply each variable in the parenthesis by the number outside.
Hope this helps.
