4 years ago

What is 0.0039 written in scientific notation?

1 answer:

5 0

3.9 * 10^-3. The way you do it is to make the number less than 10 but more than 0, then make it a product of a power of 10, ie: 120 = 1.2 * 10^2. And for numbers less than zero, the power is negative, ie: 0.03 = 3 ^ 10*-2

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Is 5x to the power of 2 y to the power of 5 Polynomial?

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No. Though, it may seem like it because there are two different variables with x and y in the same term, it is still the same one term. This would make it a monomial. Polynomials have to have more than two terms.

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3 years ago

Three raised to the square of a number, x, is equal to nine raised to the power two times the same number x decreased by one.

Lady bird [3.3K]

Answer:

Step-by-step explanation:

$3^x^2=9^{2x-1}\\3^x^2=(3^2)^{2x-1}\\x^2=4x-2\\x^2-4x+2=0\\X^2-4X+4=-2+4\\(X-2)^2=2\\|x-2|=\pm \sqrt{2} \\x=2+\sqrt{2},2-\sqrt{2}$