I) 4 Gallons
II) $77
Step-by-step explanation:
30km 1 gallon
420km ?
420 ÷ 30 = 14
? = 40
So, 4 gallons more will be needed to complete the journey.
1 gallon $5.50
14 gallon $?
14 x $5.50 = $77
The cost of the petrol is $77
5(3)= 15
15/8= 1.875
According to the Order of Operations, multiplication and division should be done left to right. The problem can be rewritten as 5a/8.
Final answer: 1.875
Slot method
10 choices for 1st slot
9 for 2nd
8 for 3rd
10*9*8=720
720 ways
First we need to simplify 
to 0.003.
We get 3000(1+0.003)
Now we simplify 1+0.0031+0.003 to 1.0031.003.
3000×1.00
Simplify {1.003}^{72}1.003 to 1.2407011.240701.
3000×1.240701
Then we simplify to <u>3722.103387.</u>
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