Alan throws a ball off a building. The ball's height above the ground in meters, H(x), after time in seconds x, is modeled by the function: –5x2 + 10x + 15. How high up was the ball before it was dropped?

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The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?

Two trains leave stations 546 miles apart at the same time and travel toward each other. one train travels at 95 miles per hour while the other travels at 115 miles per hour l. how long will it take for the two trains to meet