these are some practice question i need help with

8. Construction of the the equation of the parabola, in standard form, with zeros 1 + 2v5 + 215 and passing through the point (5, - 8) [T/I=3 marks] 9. A rectangle has sides measuring 3 V80 v80, 3 V/8, V8, 2 V18 V18 and 4V/45 4V/45 . a). Determine the perimeter of the rectangle. [A= 2 marks] b). Determine the area of the rectangle. [A=1 mark] 10. The height, h, of a projectile, in meters, can be modelled by the equation h = 14t -58, where t is time in seconds after the projectile is released. What is the maximum height reached by the projectile, and at what time this height was reached? [T/1=3 marks] 11. A mural is to be painted on the wall that is 15 m long and 12 m height. A border of uniform width is to surround the mural. If the mural is to cover 70% of the area of the wall, how wide must the border be, to the nearest hundredth of a meter? [T/I=5 marks] Thinking 12. A right triangle has a perimeter of 30 cm. Its hypotenuse measures 13 cm. What are the lengths of the other sides? [T/I=5 marks] 13. Determine the values of * * so that there is exactly one point of intersection between the two parabolas, y = - x2 - kx + 1 and y = - 2x2 + 8x - 3. [I/I=3 marks]