Write the ratio as a unit rate 27 miles in 1/2 hour a: 13.5 miles per hour b: 44 miles per hour c: 54 miles per hour d: 56 miles per hour my answer is b

Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

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Me with this one question, and i'll upvote the brainliest answer