Answer: 3.2 tons
Step-by-step explanation:
We know that 1 ton = 2000 pound
Then , 
Given : Mustafa’s horse ate 6,400 pounds of hay last year.
Then, the number of tons of hay his horse ate last year is given by :-

Therefore, the number of tons of hay his horse ate last year = 3.2 tons
Answer:
$1079.10
Step-by-step explanation:
STEP 1: Multiply $990 by Sales tax.
STEP 2: Add Sales tax with $990
STEP 3: Solve-($1079.10)
C or d i think is the correct answer