What is the scientific notation of the following number: 5,689,000,000

What is this number equivalent to: $$2.23\ x\ 10^{-9}$$  

Convert the following units: 1 mile is equal to $$2.6km^2$$  

How many kilometers would you travel in 5 miles?

1 meter = 1.094 yards

How many meters are in 5 yards?

How many grams are in a kilogram?

How many milliliters are in a liter?

Dimensional Analysis: A farmer started with 5 goats. He traded all of his goats for sheep at an exchange rate of 3 sheep for 1 goat. He then traded sheep for pigs at a rate of 1 sheep for 2 pigs. Next, he traded his pigs for canaries. For every 3 pigs, he got 27 canaries. He then sold all the canaries for $3.25 each. How much money did he make?

What is the percent change: 234.98 to 324.77

In 2000, the level of ammonia in a river was 63ppm. In 2004, the level was 112ppm. what is the percent increase since 2000?

If a population grows at a rate of 3%, how long will it take that population to double?

If a population grows at a rate of 8.5%, how long will it take that population to double?

If the producers in an ecosystem receive 32000 kcal of energy, approximately how much energy will go to the primary consumers?

If the producers in an ecosystem receive 32000 kcal of energy, approximately how much energy will go to the quaternary consumers?

Sugar beets have a gross primary productivity (GPP) of 160 g/m2/day. They have a respiration rate of 25%. What amount of their GPP is used for respiration?

Sugar beets have a gross primary productivity (GPP) of 160 g/m2/day. They have a respiration rate of 25%. What is their net primary productivity?

If an estuary has an NPP of 9000 g/m2/day and a respiration rate of 19200 g/m2/day, what is the gross primary productivity?