Barbara knit a total of 4 centimeters of scarf over 2 nights. How many nights will Barbara have to spend knitting in order to knit a total of 10 centimeters of scarf? Solve using unit rates.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Which is the graph of this function 3 square root of x plus one if