James has 3 pairs of running shoes for every 4 pairs of basketball shoes. if he has 12 pairs of basketball shoes, how many pairs of running shoes does he have?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Astore ordered 750 candles a total wholesale cost of $7910.20. the soy candles cosy $12.17 each and thespecialty candles cost $9.58each. how many of each were bought?

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g