If one root of the quadratic equation ax2+bx+c=0 is the reciprocal of the other, then a=c​

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

emily solved for a part when she should have solved for the whole. 875,000 should be the numerator of the equivalent ratio. 70 x 12,500 is 875,000. so the answer is 100 x 12,500 which is 1,250,000.

well in order to answer the question, you have to give us the dimensions of the prism first.