1. The following statements modelled a quadratic function EXCEPT:
A. The trajectory of a ball
C. A stone rolling down a stairs
B. Throwing a javelin
D. Leaping of a frog
2. Alvin predicted that the number of mango trees, x, planted in a farm could yield
y = -10x2 + 1400x mangoes per year. How many trees should be planted to produce the maximum
number of mangoes per year?
A. 60
C. 80
B. 70
D. 90
3. Vicente's assignment is to fence the school rectangular field. What are the dimensions of the largest
rectangular field that can be fence by 100m of barb wire?
A. 24 x 26
C. 50 x 50
B. 25 x 25
D. 50 x 25
4. If the sides of a square are increased by 2cm, its area becomes 289cm. Find the length of the sides of
the original square?
A. 19 cm
C. 17 cm
B. 8 cm
D. 15 cm​