<span><span>(9.5)</span><span>(10)</span></span><span>=<span>95
the answer is 10</span></span>
Answer:
10.2 years
Step-by-step explanation:
it decays 4.9% per year.
figure out how many years it takes to decay 50% (half-life)
50/4.9 = 10.2
Answer:C and E
Step-by-step explanation: