Echo Systems tracks their daily profits and has found that the distribution of profits is approximately normal with a mean of $21,100.00 and a standard deviation of about $550.00. Using this information, answer the following questions.

For full marks your answer should be accurate to at least three decimal places.

Compute the probability that tomorrow's profit will be

a) between $20,621.50 and $20,951.50

0

b) greater than $21,468.50

0

c) between $21,518.00 and $22,480.50

0