What is zero hour and what are they doing?

Arecycling company gives you 5 cents for every plastic bottle and 10 cents for every glass bottle. from a certain individual the recycling company received 59 bottles and paid $4.55. how many glass bottles did the individuals recycle?

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

You have a poultry farm and a poultry-processing unit. which product can you make using the waste products from your processing unit?