Plutonium–238 has a yearly decay constant of 7.9 × 10-3. if an original sample has a mass of 15 grams, how long will it take to decay to 12 grams?

(at = a0e-kt)

Which graph represents the parent function of y=(x+2)(x-2)

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )

6. tim is trying to study but hours go by and he doesn't get anything done. what time management advice would tim? work in smaller chunks of time an hour or less whenever you have a few minutes to spare. create flashcards. talk to your instructor right away and make a plan together for how you can get back on track, take scheduled breaks only or allow yourself only 5-10 minute breaks find somewhere quiet like a library or school to study tum off your phone and/or tell others you are busy