PLZZ HELP WILL MARK BRAINLIST

What is the square root of 45? (step by step working plz)

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4