The brick is made of concrete. Which measure would be used to find the the amount of concrete needed. Volume or surface area? The brick will be gold-plated (dipped in gold). Which measure would be used to find the amount of gold needed? volume or surface area ​

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12