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Calculate the following a. (6.7 xx 10^...

Calculate the following
a. `(6.7 xx 10^(5)) xx (4.6 xx 10^(4))`
b. `(7.6 xx 10^(7)) xx (3.8 xx 10^(-4))`
c. `(6.8 xx 10^(-3)) xx (5.2 xx 10^(-4))`
d. `(6.7 xx 10^(5)) / (4.6 xx 10^(4))`
e. `(7.6 xx 10^(7)) / (3.8 xx 10^(-4))`
f. `(6.8 xx 10^(-3)) / (3.8 xx 10^(-4))`
g. `7.65 xx 10^(2) + 2.72 xx 10^(3)`
h. `7.87 xx 10^(-4) - 2.61 xx 10^(-5)`

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