Assume the hold time of callers to tech support is normally distributed with a mean of 3.0 minutes and a standard deviation of 0.8 minutes. In a random sample of 500 callers, how many are on hold for at least 4 minutes?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

Which polygon is she in the process of constructing ?