International Space Station is 400 km above Earth and the diameter of the Earth is 12,742 km, how far is the International Space Station from the Houston Space Center? (round to nearest tenth)

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

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?

What is the lcm of 16 and 40 ? 24 and 40 ?