Asquare field measuring 100.0 m long has an area of 1.00 hectare. one acre has an area of 43,600 ft2. if a lot has an area of 12.0 acres, what is the area in hectares?

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

If the scale factor between two circles is 2x/5y what is the ratio of their areas?