1. (3.0 X 10^2) x (2.0 X 10^6)
I said 6 X 10^8
2. what is the area of a square with the dimension of 1+ �ã 2?
I don't know this one
3. Simplify: 2�ã 4 + 2�ã 8.
I said 10
4. Simplify: 2�ã 4 + �ã 4
I said 6
5. 5�ã 4 x �ã 8
----------------
�ã 8 X �ã 2
I said 10.
6. �ã y= 5 + �ã 2
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2
I said y= 2.5
Are these right?
I will assume you intended your
ã to come out as √
1. is correct, I would write it as
6.0 x 10^19
2. area = (1 + √2)^2
=1 + 2√2 + 2 = 3 + 2√2
3. 2√4 + 2√8
= 2(2) = 2(2√2)
= 4 + 4√2
4. correct
5.
(5√4)(√8)/(√8(√2)
= 5√40/√16
= 5(2√10)/4
= 5√10/2
√y = 5+√2
square both sides
y = (5+√2)^2 = 25 + 10√2 + 2 = 27 + 10√2