Tickets to a carnival are $5 for adults and $3 for children. If 215 people attended the carnival and the receipts were $925, how many children tickets were sold?

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.

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse