How many computers: in a simple random sample of 125 households, the sample mean number of personal computers was 1.02. Assume the population standard deviation is = 0.7. Construct a 99.8% confidence interval for the mean number of personal computers is?

Given right triangle xyz, which correctly describes the locations of the sides in relation to

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

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.