Half life can be used to solve for the amount (A) of a substance left after t time by using the following equation: A=A0⋅(1/2)t/h
If the half life of a substance is 4 weeks, how long will it take for 400 mg of this substance to decay to 25 mg?

Select one:
A. 8 weeks
B. 6 weeks
C. 16 weeks
D. 13 weeks

50 points to right answer

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!

ask the math teacher she or he would know lol.

step-by-step explanation: