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katrin [286]
3 years ago
15

A truck is 300 miles east of a car and is traveling west at the constant speed of 30 miles/hr meanwhile the car is going north a

t a constant speed of 60 miles/hr. Express the distance between the car and the truck as a function of time

Mathematics
1 answer:
Lerok [7]3 years ago
3 0

Answer:

d(t)=\sqrt{(300+30t)^2+(60t)^2}

Step-by-step explanation:

Let t represents the time in hours,

We know that,

Speed =\frac{Distance}{Time}

\implies Distance = Speed\times time

Since, the speed of truck = 30 miles per hour,

So, the distance covered by the truck in t hours = 30t miles,

Similarly,

Speed of car = 60 miles per hour,

So, the distance covered by car in t hours = 60t miles,

∵ Truck is 300 miles east of the car initially,

Thus, the distance of the truck from the starting point = 30t + 300,

While the distance of the car from the starting point = 60 t,

Now, these two vehicles are going in the directions which are at right angled ( car is going north and truck is going west )

Using the Pythagoras theorem,

Distance between them after t hours,

d(t)=\sqrt{(300+30t)^2+(60t)^2}

Which is the required function.

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           <em>What is the value of c in the quadratic </em>\large\text{$x^2+28=-11x$}?

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We can easily fix it by adding \large\textit{11x} on both sides:-

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Remember, the standard form of a quadratic looks like so:-

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