You have to use your calculator to solve this problem, but it is very simple. As long as you press all the right buttons, the calculator does all the work for you!
It may vary based on your calculator type, but basically you have to press the tan (or tangent) button and then press the numbers 27. Then hit enter. The number that comes up should say: 0.5095254495, which you then round to 0.5095.
Make sure when you do this problem that your calculator is in degree mode and not radian. If it's in radian mode it will give you the wrong answer.
If there are ten black pens, eight blue pens, and twenty pens in total, then there are 2 red pens. This means that the ratio of red to black is 2:10=1:5. Hope this helps!
