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3 years ago

Which number is in the correct format for scientific notation?

Mathematics

1 answer:

olchik [2.2K]3 years ago

6 0

Answer:

The answer to your question is: letter A

Step-by-step explanation:

Rules for using scientific notation:

1.- The number before the decimal point must be between 1 and 10.

2.- Determine the exponent

3.- It must be in decimal format, ( x 10)

A 3.8*10^12 This number is in correct scientific notation.

B 33.8* 10 This number is incorrect, because before the decimal point the number must be between 1 and 10.

C 3.8 *20^8 This number is incorrect because the power must be 10 not 20.

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The circle below is center Ed at O. Decide which length,if any, is definitely the same as the length. a) AD. b) BC. Justify your

Mars2501 [29]

Answer:

Point O is the center of the circle.

Part (a)

$\overline{A\:\!F}$ is a chord.

$\overline{OD}$ is a segment of the radius and is perpendicular to $\overline{A\:\!F}$

If a radius is perpendicular to a chord, it bisects the chord (divides the chord into two equal parts).

Therefore, $\overline{AD}=\overline{DF}$

Part (b)

If $\overline{BE}$ was extended past point E to touch the circumference it would be a chord.

As $\overline{OC}$ is perpendicular to $\overline{BE}$ , it would bisect the chord, but as $\overline{BE}$ is only a portion of a chord, $\overline{OC}$ does not bisect $\overline{BE}$ .

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2 years ago

What are the solutions of x2 = 8 - 5x?

jonny [76]

Answer:

That can be re-written:

x^2 + 5x -8 = 0

We use the Quadratic Formula

a=1

b = 5

c = -8

x = [-b +- sq root (b^2 - 4ac) ] / 2a

x = [-5 +- sq root (25 - - 32)] / 2

x1 = [-5 + sq root (57)] / 2

x1 = 1.27491722

x2 = [-5 - sq root (57)] / 2

x2 = -6.2749172176

Step-by-step explanation:

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3 years ago

Drinks at the fair cost 2.50$ use an equation to represent the relationship between the numbers of drinks bought ad the cost def

vodomira [7]

C=5/2*d where c-cost. d-drink

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3 years ago

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You go to the mall to make some purchases. You buy 3 dresses which cost $59.99 each and a pair of shoes that cost $75. What is t

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Combine costs
59.99(3) + 75 = 179.97 + 75
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Solution: bill would be around $275

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3 years ago

Which number is rational?

marishachu [46]

Answer:

Option D, $\sqrt{16}$ , since the answer is 4 which is a rational number considering that it's a whole number

Hope this helps!

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3 years ago