Astronomy 101 Algebra Question

Question

I’m taking Astronomy 101 this semester and this question on my homework is confusing me,

You may assume these conversions: 3.3 feet in 1 meter, 5280 feet in 1 mile, 60 seconds in 1 minute, 60 minutes in 1 hour, 24 hours in 1 day, 365 days in 1 6.

Assume you are in a spaceship that can cruise at an average of 15 km/s How long will it take you to get to our nearest star which is $2.5 \cdot 10^{13} {\rm miles}$ away? Speed of light in vacuum is 3.00 x 10^8 m/s. How long would it take light to travel that distance?

Any help explaining the steps to solving this would be appreciated because there will definitely be a question like this on the quiz (It’s a time= velocity/distance question)

That's not astrophysics, it's arithmetic. Apart from the unit conversions, all you need is that average speed equals distance covered divided by time taken. — PM 2Ring, Feb 15 '21 at 20:56
Welcome to astronomy SE! As @PM2Ring correctly mentions, the question is not really astrophysics. This aside - the question is e.g. answered easily with wolframalpha — B--rian, Feb 15 '21 at 21:11
@B--rian You don't need W|A for arithmetic & unit conversions, Google can do (2.5E13 miles)/(15 km/s) — PM 2Ring, Feb 15 '21 at 22:44
Nonetheless, welcome to Astronomy SE and have fun studying Astronomy! Please feel free to ask a new question if it's more related to the topic. — uhoh, Feb 15 '21 at 23:38
In case this question gets closed, see this dimensional analysis tutorial. — Mike G, Feb 15 '21 at 23:57
Actually converting the miles/feet to SI units is more work than the divisions :-) I calculate it to you, but only if you re-appear. — peterh, Feb 16 '21 at 08:13

Astronomy 101 Algebra Question

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