80 is 5 percent of what number

Joseph and Chandra are cleaning their house which has 12 rooms, each about the same size. If Joseph cleans them by himself, it takes him 6 hours. If Chandra cleans them by herself, it takes her 12 hours.

What was the approximate number of mobile cellular subscriptions per 100 people in Zimbabwe in 2003

Ty takes 1 hour to read 35 pages, 2 hours to read 70 pages, and 3 hours to read 105 pages, is this proportional? Explain

A 14 foot ladder is leaned up against a building. The ladder reaches a height of 2 squared 15 feet up the building. Find the distance that the foot of the ladder is form the base of the building.

Pennsylvania has a land area of 44,816 square miles. What is the land area of Pennsylvania rounded to the nearest hundered?

Gina rented shoes, bowled 3 games, and bought 1 order of nachos. she used a coupon for 1/2 off the price of her bowling games. What was Ginas total cost before tax was added?

Explain what a gradient of 1 in 14 metres means, in terms of vertical and horizontal distances.

36.8% of what number is 28.52?

Find the volume of the pyramid. Round your answer to the nearest hundredth

The median of a set of three numbers is x. there at least three numbers in the set. Write an algebraic expression, in terms of x, to represent the median of the new set of numbers obtained by a. adding 1/8 to every number in the set b.