Determine whether or not the number is written in scientific notation.0.21 × 1013

A. in scientific notation
B. not in scientific notation


Answer: B

Mathematics

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Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.tan 37°

A. 0.75 B. 0.60 C. -0.84 D. 0.80

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Solve the equation for x if . Give your answer in radians using exact values only. ? 

What will be an ideal response?

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Find the modulus of the complex number.2i

A. -2 B. 2 C. 2i D. 4

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