express in scientific notation.

0.041

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?

For each proportion find the unknown number x 1/5/8=×/15

Find the cosine function that is represented in the graph.