Steve leaves his house at 12: 30 pm and bikes 12 mph to joe's house. he stays for 90 mins, and then heads home at 2.5 mph. he arrives home at 3: 30 pm. how far is steve's house from joe's house?

Which of these choices show a pair of equivalent expressions?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?