question #3) 3 times of 5 feet inch=____feet ____ inches

I assume that you mean 3 times 5 feet means how many feet and inchesso the answer is 5 feet and blank inchesor 12 inch in 1 feet so 12 times 5=60 so 60 inchesor you may have forgotton to put a number before the first inch word like 5 feet 3 inch