Add the zeros on to 7.5 to which you would move the decimal and it should be like this 750.0 or 750
200% bc it went up 2x as much as it cost before
Answer:
I don't really know so sorry about that.
Step-by-step explanation:
Answer:
Step-by-step explanation:
Distribute.
Add 5x and subtract 15 on both sides.
Multiply -1 on both sides.
This problem can be represented through the following equation
A = A₀(1/2)^t/h
where
A-----------> is the amount of substance left after time t
A₀ ----------> is the original amount---------> 2 g
h-------------> is the half-life-----------> 8 days
for A=0.04 g
t=?
0.04 = 2(1/2)^t/8
0.02 = (1/2)^t/8
Take ln on both sides:
ln(0.02) = ln [(1/2)^t/8]
ln(0.02) = (t/8)(ln 1/2)
t = 8*ln(0.02)/ln(1/2)
t = 45.15 days
the answer is 45.15 days
