3 and 5 because 3 times 5 is 15
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The ratio surface area of two similar rectangular prism has the relationship of square time of the ratio of length. So the 1494/166=9=3². So the length of two has ratio of 3. So the length of the larger one is 5*3=15 feet.
(-5, 4)
You can get this by finding the vertex at -b/2a for x value and plugging in to find the y value.