1. Greg is training for a mountain bike race. He leaves his car at the beginning of a trail and proceeds to bike
8 miles away and then comes back the same way to
his car. If he bikes at a constant rate, the function
graphed models the distance he is away from his car
after x minutes.

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.

[tex]5 \times1 \frac{12}{13} [/tex] me

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.