I need the answers to these question (with steps)

1. Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 x 10^ 12 miles. Suppose a star is 9.8 x 10^ 1 light-years from Earth. In scientific notation, approximately how many miles is it?

2. A dinosaur fossil is 91,910,000 years old. How can you express this age in scientific notation with the highest level of precision?

3. Radio signals travel at a rate of 3 x 10^8 meters per second. How many seconds would it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.6 × 10^ 7 meters? (Hint: Time is distance divided by rate.)

thanks! :)

SO the question ask to find the approximate distance in mile of the light calculated by an astronomer where as the given is a light year, so base on the data has given, the possible answer would be 5.7624*10^14. I hope you are satisfied with my answer and feel free to ask for more

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