The Internal Revenue Service (IRS) audited 1,242,479 individual tax returns in the year 2013. A total of 145,236,429 individuals filed tax returns that year. Also in 2013, the IRS audited 25,905 corporate tax returns out of a total 1,924,887 filed. What is the probability that your tax return was not selected for an audit in 2013? Assume you only fled one individual tax return that year and assume that returns are selected for audits at random.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

I’m not sure about that

What the heck don’t understand