Paul has 15 t-shirts.
the information shows the colours of his t-shirts.
5 black
3 white
3 red
2 dark blue
1 light blue
1 yellow
paul is going to take one of his t-shirts at random.
(a) what is the probability that the t-shirt will be red?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

What is the inverse of the function f(x)=19/x³ ?