Im bored what should i do

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

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?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.