Answer:
56
Step-by-step explanation:
for this problem you would first figure out what 1/8 of 64 is. 1/8 of 64 is 8.so we do 7*8 to get 56 so 56 of the 64 houses have been sold
21
A = 177.46
A = 6*6+6root((6/2)^2+11.4^2)+6root((6/2)^2+11.4^2)