There are 5 swimmers in a race. There will be a first-place, a second-place, and a third-place prize awarded. In how many different ways can the 3 prizes be awarded?

Step-by-step explanation:

This is a permutation problem.  There are 5 swimmers in the race, and any combination of 3 will finish in the first 3 places.  The formula will look like this:

₅P₃ =  which will expand to

₅P₃ =  and when the 2 * 1 cancels out between the numerator and the denominator, you're left with simply:

₅P₃ = 5 * 4 * 3

which is 60

step-by-step explanation:

multiply length by height. multiply the length by the height, and then double the product. work out 10 x 10 results = 100 square inches, then work out 100 x 2 = 200. the answer is 200 square inches.

step-by-step explanation: