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Didi takes her pulse for 10 sec and counts 13 beats. How many beats per minute is this?

Write each rate in lowest terms. During a bad storm there was 2 in. of rain in 6 hr.

Write each rate in lowest terms. There are 130 calories in 8 snack crackers.

Write each rate in lowest terms. There are 50 students assigned to 4 advisers.

Write the ratio in lowest terms. \(5 \mathrm{mi}\) to \(25 \mathrm{mi}\)

Write each rate in lowest terms. Jill's portfolio changed by \(-\$ 2600\) in 6 months.

Write the ratio in lowest terms. \(8 \mathrm{m}\) to \(2 \mathrm{m}\)

Write the ratio in lowest terms. 14 oz to 7 oz

Write each rate as a unit rate and round to the nearest hundredth when necessary. The Osborne family drove \(452 \mathrm{mi}\) in 4 days.

If you flip a coin many times, the coin should come up heads about 1 time out of every 2 times it is flipped. If a coin is flipped 630 times, about how many heads do you expect to come up?