Ahotel plans to use marble for part of the floor lobby. the marble section of the floor will be in the shape of a triangle with a base of 80 feet and a height of 60 feet. the marble flooring costs $6 per square foot. how much will the marble for the floor cost?

In the diagram below what is the approximate length of the minor arc ab

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).