Answer:
Step-by-step explanation:
did not go on the class field trip = 360 -315 = 45.
315 did
therefore
360-315=45 didnt
45/360 students didnt go on the trip
so to turn this into a percentage, just multiply this fraction by 100:
45/360*100 = 12.5%
b.300cm
0.25
Answer: 13
If you remember the quadratic equation formula;
You can easily extract what is under the root to find the discriminant.
a = 3
b = 7
c = 3