Answer:
60
Step-by-step explanation:
25÷5=5
5×12=60
have a great day! :)
Answer:27/40
Step-by-step explanation:
7/8-1/5
35/40-8/40=27/40
Don't lie about giving branliest. People will help regardless.
Answer:
Step-by-step explanation:
Does it say what x and y equals
7978 years
Step-by-step explanation:
A = A02^(-t/hl)
where hl = half-life.
Dividing both sides by A0 and taking the logarithm, we get
ln(A/A0) = -(t/hl)ln2
or solving for t,
t= -(hl)ln(A/A0)/ln2
note that A/A0 = 0.38
t = -(5715 yrs)[ln(0.38)/ln2]
= 7978 years
