Answer:
C
Step-by-step explanation:
do that with pithagoras:
20² + 4,5² = x²
400 + 20,25 = x²
420,25 = x²
x = 
x ~ 20,5
Letter C: 20,5 feet
Step-by-step explanation:
1200 students=130%(100% +30%)
100%=?
100% ×1200/130%
800students
1)180= 18 tens(18*10=180)
2)1600=16 hundreds(16*100=1600)
3)6000=6 thousands(6*1000=6000)
4)2700=27 hundreds(27*100=2700)
Hope this helps:)
Answer:
11/2,5.5
Step-by-step explanation: