Question 1147349
David and Amy start at the same point and begin biking in different directions. David is biking west at a speed of 17 miles per hour. Amy is biking south at a speed of 15 miles per hour. After how many hours will they be exactly 23 miles apart? Round your answer to two decimal places.
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It's a right triangle, and 23 miles is the hypotenuse.
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t = time in hours
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(17t)^2 + (15t)^2 = 23^2
289t^2 + 225t^2 = 529
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Solve for t
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Odd that it says "exactly 23 miles" then says round to 2 places.