Answer:
1. P 3400.00
2. 45 minutes
3. 120:480:600 faceshields each
Step-by-step explanation:
used direct proportion
1. 5:850 , 20:N
5N = 850 x20
5 5
N= P 3400
2. use inverse proportion
30:60 , 40: N
60:40, 30:N
40N =60x30
40 40
N = 45 minutes
3. use partitive proportion
1N+4N+5N=1200
10N = 1200
10 10
N = 120
1(120): 4(120):5(120)
=120:480:600 faceshields