I need help with these two geometry problems. Do not put up a link to a site. I cannot view images from others sites other than this one. (Please no sin/cos/tan)

**Find the value of each variable.**

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

True or false? the sum of the differences (% - 7) is never zero for any distribution consisting of n observations.

Abarge can safely haul no more than 400 tons across the river. the barge has an empty weight of 24 tons. the average weight of the railroad cars is 4 tons each.bhow many railroad cars can the barge haul?