What should you do first to write 5.871 x 10'in standard form?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

What are the values of a, b, and c in the quadratic equation 0 = x2 – 3x - 2? a = 1, b = 3, c = 2 a=, b = -3,c=-2 a = 1, b = 3, c= 2 a = 1.0= -3, c = 2