Ashadow 60 feet long is cast by an observation tower that is 32 feet tall. if a nearby oak tree is 8 feet tall, then how long will the oak tree's shadow be?

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

How do i multiply two digit numbers

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms