Breakfast at the local cafe costs harry $38.70 without taxes. he wants to leave a 15 percent tip. how much should he tip

Use the graph of the sine function y=2sinθ shown below

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?