Under Republic Act 4136, violators of under-speeding and over-speeding will be penalized. Relative to this, expressways have set certain speed limits. For Subic- Clark-Tarlac Expressway (SCTEX) and Tariac-Pangasinan-La Union Expressway (TPLEX), the minimum speed is 60 kph and maximum speed is 100 kph. On the other hand, the minimum speed for cars at North Luzon Expressway (NLEX) and South Luzon Expressway (SLEX) and Cavite Expressway (Cavitex) is 60 kph. The maximum speed for cars is 100 kph while it is only 80 kph for trucks and buses. A bus is traveling to Metro Manila at dawn. The bus maintains a speed of 20 m/s while travelling at TPLEX. When the bus reach NLEX, it is now traveling at a rate of 27 m/s. During this travel, did the driver violate RA 4136? If yes, what is his violation? If no, why did you say so? In either case, please provide necessary solutions to support your answer.

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A: Apologies for the inconvenience.   We graph the given equations using graphing calculator.

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.