11

A human heart beats about 100,000 times in one day.

A canary's heart beats about 1,000 times per minute.

What is the heartbeat ratio of canary to human?

12

All of a person's blood vessels can stretch out to about 60,000 miles.

The Earth's diameter is about 7,926 miles.

How many times can the blood vessels wrap around Earth's circumference?

13

In March 2020, President Trump signed a $2.2 trillion coronavirus rescue package.

There are about 3.2 million full-time teachers in the U.S. The average teacher salary in California during 2018-2019 is $82,282.

With the $2.2 trillion, how many years can we pay this salary to all the teachers in the U.S.?

14

We are told that the Milky Way has 300 billion stars, and the Universe has upwards of 70 sextillion stars. 

Written in scientific notation, 70 sextillion is 7 x 10^22.

Write the ratio of stars in the Universe to the stars in the Milky Way in scientific notation.

15

Savethechildren.org is a 100-year-old organization that, in 2018 alone, reached more than 134 million children in 120 countries, including the U.S.

In 2018, Save the Children had a revenue of $881 million, an annual increase of over 9%. 

What is the revenue for 2019 if they hope to see the same rate of increase?

16

A whale's intestine is about 8 times its body length, while a cow's intestine is 20 times as long as its body. 

A whale's intestine is about 5.5 times longer than a cow's intestine. 

A cow is about 2 m long, and based on the numbers above, how long is a whale?

17

The Earth's circumference is 24,901 mi. The world's population is about 7.8 billion. 

During the coronavirus pandemic, everyone is asked to stay at least 6 feet away from other people to lessen the chance of catching COVID-19. 

If everyone stands 6 feet apart in a single line, how many times would this human "un-linked" chain wrap around Earth? (Ignore the fact that people will overlap each other as the chain loops on itself.)

18

An ant can carry 50 times its own weight. But a certain species of dung beetle can pull 1,141 times its own body weight.

An ant weighs about 0.004 g, and a dung beetle weighs about 20 g.
​
How many ants must work together to carry one dung beetle? How many ants can one dung beetle pull?

19

DNA from one of your cells when uncoiled and placed end to end measures 6 feet. Your body has about 37.2 trillion cells.

The sun's circumference is 2.72 million miles.

If all the body's DNA is connected into a strand, how many times would it wrap around the sun?

20

As of April 1, 2020, the 972 sq-ft house (on the far left) in Oak View, CA, is for sale for $519,000. 

The other 3,610 sq-ft house is in Austin, TX. It's listed at $543,990.

What is the ratio, in dollars per square foot, of Oak View to Austin?