## Precalculus Resources

Kelly originally had 250 people on the guest list to her wedding reception and the cost per person for the dinner was \$48.90. If she wants to spend the same dollar amount on dinner for her guests,...

At Seedie's, the price of all CD-players was reduced 25%. Store employees are given an additional 10% discount off the sale price. Sales tax is 7.25%, and is applied after all discounts are taken...

1. Two of the three missing digits of the five-digit perfect square number 3, _, _, _, 9 are the same. What is the other missing digit? 2. What is the least positive multiple of 25 for which the...

(a) If the temperature of the turkey is 142 Fahrenheit after half an hour, what is its temperature after 45 minutes? (b) When will the turkey cool to 100 Fahrenheit?

The 1906 San Francisco earthquake had a magnitude of 7.9 on the MMS scale. Around the same time there was an earthquake in South America with magnitude 6.2 that caused only minor damage. How many...

The population of a city has risen and fallen over a 20-year interval. Its population may be modeled by the function y = 19,000 + 7,000 sin(0.658x), where the domain is the years since...

Earth orbits the sun in an elliptical pattern. The equation of Earth's path is (x+2.5)^2/22350.25 + y^2/22344=1 where the measurements represent millions of kilometers. The sun is located...