If a student was randomly guessing while completing a 20 question multiple choice exam, what is the probability they would score a 50% or higher?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Hurry im being timed the graph of f(x)=x^3-3x^2+4 is shown based on the graph how many distinct real numbers solutions does the equation x^3-3x^2+4=0 have

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters