The population of the united states is 3 × 108 people, and the population of the world is 6.9 × 109 people. how many times larger is the world population? write your answer in standard notation.

You love to play soccer! you make a shot at the net 8 times during a game! of those 8 attempts, you score twice. what percent of the time did you score?

Solve the formula ax+ by = c for x.

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.