Which statement is not always true? (Please explain why) a) The sum of two rational numbers is rational.

b) The product of two irrational numbers is rational

c) The sum of a rational number and an irrational number is irrational

d) The product of a nonzero rational number and an irrational number is irrational

answer: the dogs need to shift their focus to human scent.

its because the dogs being trained are for search and rescue thus they need to be able to track humans and their specific scent

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

angle efh= angle egh