Answer:
D 81
Step-by-step explanation:
It is not prime. It can be divided by a number other than 1.
Answer:
B
Step-by-step explanation:
You can divide the larger number by the smaller number for all of them and see if they all match. If they dont then its not porportional.
Cosθ = adjacent / hypotenuse

I hope I helped you^_^
Answer:
-1
Step-by-step explanation:
so firstly we solve by integrating by parts.
lnX × X - the integral of x/x
so the integral is Xln(X) - X
so the value should converge at -1