Find the work done by the force field f(x, y,z)=3xi+3yj+7kf(x, y,z)=3xi+3yj+7k on a particle that moves along the helix r(t)=3cos(t)i+3sin(t)j+3tk,0≤t≤2π

Call the path . Then the work done by along is given by the line integral,
Swapping the notation out for ordered component notation, I'll write

so that

The line integral reduces to

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425