Astronauts traveling to the international space station have to be very careful about weight (it
takes about 9 lbs of rocket fuel to send 1 lb of stuff to the station). each astronaut can bring
approximately 11 lbs of personal items (mementos and clothes) with them into space. each
memento weighs about 0.1 lb, and each item of clothing weighs about 0.5 lbs. if an astronaut
wanted to bring 30 items with them, how many mementos and pieces of clothing would they
bring?