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arsen [322]
2 years ago
5

What is 6,400,000 written in scientific notation?

Mathematics
2 answers:
Arlecino [84]2 years ago
8 0

Answer:

B

Step-by-step explanation:

6.4 × 1000000 is 6,400,000

10⁶ = 1000000

EleoNora [17]2 years ago
8 0

Step-by-step explanation: To write a number in scientific notation, first write a decimal point in the number so that there is only one digit to the left of the decimal point.

So here, we have 6.400000 and notice that there

is only one digit to the left of the decimal point.

Next, we count the number of places the decimal point would need to move to get back to the original number, 6,400,000.

Since we would need to move the decimal point 6 places to the right, we have an exponent of positive 6.

Now scientific notation is always expressed as a power of 10.

So in this case, we will have 10 to the 6th power.

So we have 6.400000 x 10^{6}.

The exponent is positive because we would need to move the decimal point 6 places to the right in order to get back to our original number.

So 6,400,000 can be written in scientific notation as 6.400000 x 10^{6}

or just 6.4 x 10^{6} since we can drop zeroes at the end of a decimal.

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Answer:

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Step-by-step explanation:

1.

Cot is the trigonometric ratio defined by "adjacent" over "opposite". <em>So, adjacent = 2 and opposite = 3.</em>

By pythagorean theorem, we have the "hypotenuse" as  \sqrt{2^2+3^2}=\sqrt{13}

Csc is defined as the trig ratio "hypotenuse" over "opposite". <em>We know the sides, so Csc \theta = \frac{\sqrt{13} }{3}</em>

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<em>First answer choice is right.</em>

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2.

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Third answer choice is right.

3.

By definition tan and cot are inverse of each other. <em>So the value of tan is the reciprocal of the value of cot.</em> We can simply "flip" the value of tan theta to get the value of cot theta. Hence:

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