Find the ratio in simplest form.
15 minutes to 2 hours

Aquadratic function f(x) has a turning point at (3,-7). what is the turning point of -f(x)?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)