Scientists discovered a large star 250,000 light-years from earth. a light-yearis about 5,880,000,000,000 miles. what is the distance of the large star fromearth in scientific notation?

B. 1.47*10^18

Step-by-step explanation:

Given

Distance of largest start from earth in light years = 250000

1 light year = 5880000000000 miles

So,

Distance of largest star from earth in miles = 250000 * 5880000000000

= 1470000000000000000 miles

In order to convert in scientific notation, point will be moved 18 places to the left, so the number will become:

1.47* 10^18 miles

So option B is correct..

OPTION B

Step-by-step explanation:

Scientific notation has the form:

Where "a" is a number between 1 and 10 but is not less than 10 and "n" is an integer.

If a light-year is about 5,880,000,000,000 miles and the large star is 250,000 light-years from Earth, then this distance in miles is:

To express this distance in scientific notation, the decimal point must be after the first digit. You can observe that the decimal point must be moved 18 places, then:

and  

Therefore, you get that the distance of the large star from Earth in scientific notation is:

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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