ce bio 99 Q.49

Q.9:
If correct to 4 sig. fig., you must know the fifth decimal place
(0.8448? & 0.8452? ). However, it is not given to you ! So, ans. D is wrong.

Q.42:
y-intercept = b<0
x-coordinate of vertex = -a/2(- 1) >0
=> a>0
ANS: C


Q.51 :

(< = angle , ^ = triangle !)



ANS : B