A speck of dust is 5.0 x 10-7 m wide. Which of the following is the best way to rewrite this quantity, using more appropriate units?
A. 5.0 x 10^-7 m
B. 5.0 x 10^-4 mm
C. 5.0 x 10^-5 cm
D. 5.010^-10 km

HELP PLEASE

Given: f(x) = 2x + 5 and g(x) = x2 and h(x) = -2x h(g(f( = x2+ vx+ x + y

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