Help, please In trapezoid ABCD, the base ratios BC / AD = 8. Taking the vectors AC, BD as the basis, find the coordinates of the vectors AB, BC, CD, DA.

The value of cos 30° is the same as which of the following?

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.

The ideal weight of a nickel is 0.176 ounce. to check that there are 40 nickels in a roll, a bank weighs the roll and allows for an error of 0.015 ounce in total weight