1.	The expression 3 · 3 · 3 · 3 can be written using exponents as _____.
		A.	43	B.	34
		C.	4(3)	D.	3(4)
		Hint
	2.	Write 3x3y5 as a multiplication expression.
		A.	3 · x · x · x · y · y · y · y · y
		B.	3 · 3 · x · 5 · y
		C.	(xy2)3
		D.	2(3x3y5)
		Hint
	3.	Evaluate the expression –2a3 + 3z2 if a = –3 and z = 2.
		A.	-180	B.	-42
		C.	66	D.	252
		Hint
	4.	Numbers that are expressed using exponents are called ________.
		A.	scientific numbers	B.	perfect squares
		C.	bases	D.	powers
		Hint
	5.	A fish called the Coelacanth who was thought to be extinct for 4 · 108 years was discovered alive in 1938. Write 4 · 108 years without exponents.
		A.	4 billion years	B.	400 million years
		C.	40 million years	D.	40 billion years
		Hint