Using the conversion factor from ev (electron volts) to joules, determine which energy line for an electron dropping from one energy level to another would show a line at 435 nm in an emission spectrum. use the formulas and the energy level information below to answer the question.
needed constants:

1.00ev = 1.6 * 10^-19 j
c = 3.00 * 10^8 m/s
h = 6.63 * 10^-34 j*s

energy level values:
e6: e= -0.378 ev
e5: e= -0.544 ev
e4: e= -0.850 ev
e3: e= -1.51 ev
e2: e= -3.403v

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.