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⋅(12)th
If the half life of a substance is 2 days, how long will it take for 100 mg of this substance to decay to 12.5 mg?

Select one:
A. 10 days
B. 4 days
C. 6 days
D. 8 days

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p