(4.8 x 10^9)^(1/2) is closest in value to
(A) 2,200
(B) 70,000
(C) 220,000
(D) 7,000,000
(E) 22,000,000
B
(A) 2,200
(B) 70,000
(C) 220,000
(D) 7,000,000
(E) 22,000,000
B
Two IMPORTANT concepts:AbeNeedsAnswers wrote:(4.8 x 10^9)^(1/2) is closest in value to
(A) 2,200
(B) 70,000
(C) 220,000
(D) 7,000,000
(E) 22,000,000
B
1) n^(1/2) = √n
2) √(xy) = (√x)(√y)
So, (4.8 x 10^9)^(1/2) = √(4.8 x 10^9) by Rule #1
= √(48 x 10^8)
= (√48) (√10^8) by Rule #2
≈ (7)(10^4)
≈ (7)(10,000)
≈ 70,000
Answer: B
