over a ten year period, the population of one city changed from 3.2 million to 2.8 million. what was the percent change in the city's population?

How can you calculate the interior and exterior angles of a polygon

The lengths of the sides of a triangle are in the extended ratio 5 : 8 : 10. The perimeter of the triangle is 69 cm. What are the lengths of the sides?

A tree is 212 feet tall. How tall will it be in 3 years if it grows 14 foot each year? Which method will NOT give the correct number of feet?

Lucy plans to drive 360 miles. If her car can travel 20 miles per gallon of gas, how many gallons of gas will she need to make the trip?

Determine which ratio forms a proportion 24/18

Gavin's anemometer measures the wind speed at 44.14 kilometers per hour. 4 times the wind speed 5 hours ago. What was the wind speed 5 hours ago?

Find the next three terms in the numbers sequence 3,10,19,26,_,_,_.

Simplify the expression cosxcscxtanx

Simplify (2^3) ^-2. 1) - (1/64) 2) 1/64 3) 2 4) 64

And is currently h years old. Bill is currently 2h years old and Charles is currently eight years old. Find an expression for each person's age after h years. Then find an expression for the sum of their ages after h years.