1- If Antonio did ten laps in the pool , how many minutes will it take him? 2-Antonia and Maria each swam laps in a pool. Who has the best time per lap.

Could someone with number 1 and 2

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?

The floor of a building consists of 3000 tiles which are rhombus shaped and each of it's diagonals are 45 cm and 30 cm in length. find the total cost of polishing the floor, if the cost per m² is rs. 4.