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iVinArrow [24]
3 years ago
10

Write an exponential function to represent a situation in which the initial value is 175 and the rate of decay is 20%

Mathematics
1 answer:
AleksAgata [21]3 years ago
6 0

Answer:


Step-by-step explanation:

F(X)=(1/5)^T/175

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Tourists covered 640 km for a 4 hour ride by car and a 7 hour ride by train. What is the speed of the train, if it is 5 km/h gre
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Answer:

60 km/h

Step-by-step explanation:

Let us use the x to represent the speed of the car since it is the smaller value.

Then, the distance covered by the car is 4x since was going 4 kph.

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We know that the total distance covered is 640 km.

Using this information, we can set up the equation 4x+7x+35=640.

By subtracting both sides by 35 and combining the x's, we get a new equation of 11x=605.

After this, we divide both sides by 11 and get x=55.

Lastly, we add 5 to 55 since the train is 5 km faster than the car and that x stood for the car.

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2 years ago
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