Is 27 an irrational number?

Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

What function has a range {yly< 5}? question on picture above^