80/19= 4, 21
21 feet times 19 feet = 399 square feet
449
21-50
19 with remainder 1.
Not an even number of times.
if you multiply 21 and 9 it equals 189
(21 + 21 + 19 + 19)/4 = 20
21+21+19+19=80
times
1.1053
There are 8 numbers. So you need to find the average of the 4th and 5th numbers when they are placed in order. So, average of 16 and 19 = 17.5