Describe the graph of y- 3x^2 and compare it with the graph of y-x^2

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?