i am not shure what the answer is to this?
Answer:(9y-7)(9y+7)
Step-by-step explanation:
81y^2-49
=(9y)^2-(7)^2
=(9y-7)(9y+7)

r - radius, h - height
The diameter is twice the radius.

The answer is c. 791.3 m³.
81.7 ounces or 5.11 pounds, work is shown above if you need to show your work.
140/1
because anything divided by 1 is itself, and a fraction is just the numberator divided by the denominator.