57. Seven-ninths
what is seven ninths as an algebraic expression

At the skate park, an average of 126 bicycle per day are rented in october. this number is 10% less than the average number of bicycles rented per day in september. on aberage, how many bicycles are rentes per day in september. a. 113 b. 140 c. 139 d. 135

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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.