Set up a ratio:
You drove 72 minutes and 100 km = 72/100
You want the number of minutes (x) to drive 150 km = x/150
Set the ratios to equal each other and solve for x:
72/100 = x/150
Cross multiply:
(72 * 150) = 100 * x)
Simplify:
10,800/100x
Divide both sides by 100:
x = 10800/100 = 108
This means it would take 108 minutes to drive 150 km.
Now subtract the time you have already driven to fin how much more you need:
180 - 72 = 36 more minutes.
1. v=d/t=7.5/1.5=5 km/h
2. v=d/t=(v1*t1+v2*t2+v3*t3)/(v1+v2+v3)=(15*10+20*10+25*5)/(10+10+5)=
=(150+200+125)/25=475/25=19 m/s
Answer:
44) 40%
46) 33.3%
68) 8%
74) 72 units
Step-by-step explanation:
44) 20/50= .2= 2-%
46) 5/15= .333= 33.3%
68) 24/300= .08= 8%
74) .8x90= 72
decimal can be made into percents multiplying by 100 (decimal point 2 spots to the right)
percent can be made in to decimals by dividing by 100 (decimal point 2 spots to the left)
