In 2014, the population of the world was about 7,125,000,000 people. Choose the best approximation of the world population in 2014.
Choose 1
7x10^8 people
7x10^9 people

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?

What is the total surface area of the square pyramid

Asalad dressing recipe calls for 1 teaspoon of vinegar and three tablespoons of olive oil to only make 1/3 of the recipe for a single portion how much of each ingredient would you need