A baseball is thrown upward at an initial speed of 9.5 m/s. The approximate height of the ball, h meters, after t seconds, is given by the equation h= -4.9t+9.5t+1. At the same time, a golf ball is hit upward at an initial speed of 12 m/s. The approximate height of the ball, h meters, after t second, is given by the equation h=-4.9t^2+12t. When are both balls at the same height? Round to the nearest tenth.

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?