Which choice represents the fraction below as a single exponential expression? 5^4/5^8
a)5^-4
b)1/2
c)5^4
d)5^2

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Don't know how to find x given these segment lengths

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?