Gold-192 is a radioactive isotope with a half-life of 4.95 hours. how long will it take for a 15 gram sample of gold-192 to decay until only 3 grams remain? a. about 11.5 hoursb. about 24.75 hoursc. about 7.92 hoursd. about 2.13 hours

The answer should be A. In order to solve these half-life problems, I encourage you to find an algebra calculator online, and plug in these numbers. The remaining grams goes in front, so 3.

The entire equation should look something like 3 = 15(1/2)^t/4.95

The 4.95 represents how long it takes before the sample halves, t is your answer, 1/2 represents the value halving every 4.95 hours, 15 is the initial sample size, and 3 is the end result that remains.

The overall answer should be about 11.5 hours, as per an algebra calculator.

Hope this helps solve any other similar problems

the distance from any point on the parabola to the focus is the exact same as the distance from that point to the directrix.

if you could provide answer choices that might allow me to answer the question easier if my above answer isn't an option! (:

ok then what happened.