3 years ago

Write in scientific notation 0.00042 urgent !!!!

Mathematics

2 answers:

Black_prince [1.1K]3 years ago

5 0

$42 \cdot 10^{-4}$

amm18123 years ago

5 0

Answer:

4.2 * 10^-3

Step-by-step explanation:

As scientific notation cannot include answers more than 10, the other answer is wrong.

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Hi, can someone please help, and possibly explain the answer please.

mr_godi [17]

Answer:

$x=\frac{-(-2)\±\sqrt{(-2)^2-4(3)(0)} }{2(3)}$

Step-by-step explanation:

Quadratic formula: $x=\frac{-b\±\sqrt{b^2-4ac} }{2a}$ when the equation is $0=ax^2+bx+c$

The given equation is $1=-2x+3x^2+1$ . Let's first arrange this so its format looks like $y=ax^2+bx+c$ :

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Subtract 1 from both sides of the equation

$1-1=3x^2-2x+1-1\\0=3x^2-2x+0$

Now, we can easily identify 3 as a, -2 as b and 0 as c. Plug these into the quadratic formula:

$x=\frac{-b\±\sqrt{b^2-4ac} }{2a}\\x=\frac{-(-2)\±\sqrt{(-2)^2-4(3)(0)} }{2(3)}$

I hope this helps!

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3 years ago

What is fifty two thousand, fifty two in standard form

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A salad costs $2. a steak dinner cost 6 times as much. how much does the steak dinner cost?

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