Explain how to calculate this mentally 1. 15is the percentage of
30

2. 3 is what percentage of 12

3. Six is what percentage of 10

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?