Damian measured a line to be 9.4 inches long. If the actual length of the line is 7.8 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?

Which value is not a solution of 8x^3 – 1 = 0

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?

Find the area of the triangle shown 3 by 6