How long will it take 36 grams of plutonium-240 to decay to 12 grams?

Aiko jumped rope for 20 min and stopped at 8: 05 when did she start

Eiko is wearing a magic ring that increases the power of her healing spell by 30%30\%30%30, percent. without the ring, her healing spell restores health points. which of the following expressions could represent how many health points the spell restores when eiko is wearing the magic ring?

An animal shelter spends $4.00 per day to care for each bird and $6.50 per day to care for each cat. olivia noticed that the shelter spent $212.00 caring for birds and cats on thursday. olivia found a record showing that there were a total of 38 birds and cats on thursday. how many birds were at the shelter on thursday?