C.
Foil method reverses factor
6 and 5.
6 is one more than 5, and 5 * 6 = 30.
Hope this helps! Have a great day :)
Answer:
Maybe the answer must be 90°
The options you gave are extremely confusing, but if you round 7.9 it is 8, and if you round $3.89 it is $4. Therefore, the best estimate would be 8•$4, or $32
