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Grace [21]
3 years ago
10

A student found the product of 6 x 10^5 and 5 x 10^6 to be 3 x 10^11. What is the error? What is the correct product? Complete t

he explanation.
The student ____.

A.divided instead of multiplied.

B.is orf by a power of 10.

C.rounded incorrectly.

The correct product is ______ x 10^11 or
____.​

Mathematics
1 answer:
Rainbow [258]3 years ago
3 0
The student is off by a power of 10

The answer is 3 x 10^12
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If cos A = 3 over 11, then which of the following is correct?
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Answer:  The answer is (a) sec A = 11 over 3.



Step-by-step explanation: Given that Cosine of an angle 'A' is 3 over 11,

i.e.,

\cos A=\dfrac{3}{11}.

And we need to find which one of the given four options is correct.

We have the following relations between cosine, secant and cosecant of an angle from trigonometry.

\sec A=\dfrac{1}{\cos A}~~\textup{and}~~\csc A=\dfrac{1}{\sqrt{1-\cos^2 A}}.

Therefore,

\sec A=\dfrac{11}{3}

and

\csc A=\dfrac{1}{\sqrt{1-\frac{9}{121}}}=\dfrac{1}{\sqrt{\frac{112}{121}}}=\dfrac{11}{4\sqrt 7}.

Thus, the correct option is (a)  sec A = 11 over 3.

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