holly wants to save money for an emergency. holly invests $800 in an account that pays an interest rate of 4%. how many years will it take for the account to reach $1,600

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?