Mrs. Dickinson babysitting little Bubba on the weekend for 12 hours. When he first comes over, they play and sing ones for 1/3 of the baby sitting day. He gets pretty tired from being so excited to be with his Nana, so he naps for 1/4 of the remaining time. When little Bubba wakes up from his nap, how much time will be left for them to hang out?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.