Convert 1.88x10^-6 to ng

Nine more than four times a number is the same as one less than twice the number. find the number?

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by

What is the gcf of 20c^3-5c^4+30c^6