Tina made a batch of chocolate chip cookies on Tuesday and a batch of peanut butter cookies on Wednesday. She used 123cups of sugar for the chocolate chip cookies and 212 cups of sugar for the peanut butter cookies. How much sugar did she use for both batches of cookies combined?

How do you summarize data in a two-way frequency table?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.