# I need help with converting units

**Question description**

Use the conversion factor of 1 light year = 9.46 x 10^12 kilometers or 5.88 x 10^12 miles to determine the following. [*Note*: Carry out all computations with most possible accuracy and then express your answers in scientific notation, N x 10^n, 1 < or equal to |N| < 10. All coefficients, n , must be rounded to two decimal places.]

a. Alpha Centauri, the nearest star to our sun, is 4.3 light years away. What is the distance in kilometers? How many miles away is it?

_____ km

and / or

____ mi

b. The radius of the Milky Way is 10^8 light years. How many meters is that?

_____m

c. Deneb is a star 1600 light years from Earth. How far is that in feet?

____ft

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