Solve one of the following two differential equations using variation of parameters^"x" through whichever equation you would not like graded. if you don't put an "x" through either equation, i will grade whichever problem i prefer to grade. a) y" + 2y' + y = e^-t ln t b) y" + y = cos^2 x

This is so hard and it’s for a test

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?