Why is the first stage of a large roller coaster (which usually takes the riders up a large incline) assisted by a chain under the roller coaster carts?.

Afour-year college’s application process takes into account all of the following except

Alaser tag arena sells two types of memberships. one package costs $325 for one year of membership with an unlimited number of visits. the second package has $125 enrollment fee, includes five free visits, and costs and additional $8 per visit after the first five. how many visits would a person need to use for each type of membership to cost the same amount over a one-year period?

Tissues that carry food water and nutrients throughout the plant