[SoothingDave]

Write a ratio and compare 3.75 miles t0 1000 yards (1760 yds = 1 mile)

What you want to do, if I understand this right, is express a ratio using whole numbers?

To do this you need to first convert both values to the same unit of measurement. You want the smallest unit of measurement (meaning the largest numerical value). So in this case we want to convert to yards.

So 3.75 miles (times 1760) is 6600 yards. 6600 yards to 1000 yards. We can then drop the extra zeros (divide both by one hundred). 66 to 10.

Write a radio to compare 21/2 yards to 5 feet (3 ft = 1 yard).

Again, pick the smallest unit of measure. That would be feet. 2.5 yards would be (2.5 times 3) 7.5 feet.

7.5 feet to 5 feet. But we don't like decimals or fractions. So multiply by 2. 15 to 10.

SD

[Tanniker Smith]

How far does a car traveling 30 mph travel in one second?

How long does it take the average fastball to travel from the pitcher's hand to the catcher's mitt? (To make numbers simple, assume an "average" fastball travels at 90 mph, which is actually kind of slow.)
(Hint: use the relationship in the first problem.)