There were 2.1 million people living in Dubai in 2013 1.75 million of these people were not born in Dubai.
Work out 1.75 as a percentage of 2.1

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?