Is this number is scientific notation? Yes or No 3.2345 + 10^12th

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Adeposit of 5500 at 6% for 3 years equals

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters