In a nuclear reaction, 150 grams of Plutonium-239 are produced. The half like of Plutonium-239 is 24,400 years. How many years will need to elapse in order for there to be less than 10 grams remaining

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !