Hi, I need help on Calc vector problems!

1) Find the values ofxsuch that the given vectors are orthogonal. (Enter your answers from smallest to largest.)

xi+3xj

xi-4j

2) Find the scalar and vector projections ofbontoa.

a=3,4,b=3,6

3) Find the distance from the point (4,17) to the liney=4x.

4) A woman exerts a horizontal force of80lb on a crate as she pushes it up a ramp that is5ft long and inclined at an angle of 20above the horizontal. Find the work done on the box. (Give your answer correct to the nearest whole number.)

5) A woman exerts a horizontal force of80lb on a crate as she pushes it up a ramp that is5ft long and inclined at an angle of 20above the horizontal. Find the work done on the box. (Give your answer correct to the nearest whole number.)