The senior class is planning a trip that will cost $55 per student. If $4180 has been collected  from the seniors for the trip, how many have paid for the trip?

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?