Find the product and express it in scientific notation.

3.1 x 10-4 x 8.5 x 10-2
A) 2.635 x 10 -8
B) 2.635 x 10 -6
C) 2.635 x 10-5
D) 26.35 x 10-8

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.