An airport limo service charges riders a fixed charge of $20 plus $3.00 per mile. How many miles must a rider go to have an
average cost per mile of $3.80?

step-by-step explanation:

answer: 12   they all have at least 28 days

step-by-step explanation: haha

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft