Since we don't want to use the Pythagorean Theorem on all of these, first we look for some Pythagorean Triples. Its very helpful to know some of the common ones, so here's a list:
3, 4, 5
5, 12, 13
7, 24, 25
8, 15, 17
So we either look for these or a multiple of these numbers.
The last one is the only one that fits because 15, 20, 25 is a multiple of the triple 3, 4, 5 by multiplying all of them by 5.
Thus, 15, 20, 25 forms a right triangle.
42/28 = 1.5
3 times 1.5 = 4.5
he would be able to run 4 and a half miles in 42 minutes
10.9 is closer to 10.
If you add another 0 to the end of 10.9 to make it 10.90, you may realize that it is less than 10.99, which has a 9 in the hundredths place.
The answer is 480. Because you times 200 by 6, you also times the number of male elephants with tusks (80) by 6. That means the answer is 480.
