Bob can type 2 letters in 4 hours while bill can do it in 6 hours. how many hours would it take them to type six letters together?

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?