Roger's Tea Shop has caffeinated tea and decaffeinated tea. During the lunchtime rush, the tea shop served 100 teas in all, 20% of which were caffeinated. How many caffeinated teas did the tea shop serve?

Ithink it’s b because it say 3 plastic rings and all the balls

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 !