Dining two years, the population of birds on an island became 7 times more than before. If the first year increase in the population was 40% , what was the percent increase of the second year?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *