Jeff is lining up children’s and adult's bicycles at the bike shop where he works. The number of adult's bicycles is nine less than three times the number of children’s bicycles. There are 42 adult bicycles. How many children’s bicycles are there?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Combine the information in the problem and the chart using the average balance method to solve the problem.

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?