A candy bar costs $0.80. The company raises the price to $1.10. What is the percent increase in the price of the candy bar?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

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.

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.