Question

each first class ticket (costs/cost) six hundred rupees​

Answer 1

Answer:

costs

Explanation:

each is singular

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Answer 2

Answer:

It causes a decrease in the amount of a gas in the blood (called carbon dioxide, or CO2). This decrease may make you feel lightheaded, have a rapid heartbeat, and be short of breath. It also can lead to numbness or tingling in your hands or feet, anxiety, fainting, and sore chest muscles.That's when you inhale much deeper and take much faster breaths than normal. This deep, quick breathing can change what's in your blood. Normally, you breathe in oxygen and breathe out carbon dioxide. But when you hyperventilate, the carbon dioxide levels in your bloodstream drop too low.