An Indium-Gallium-Arsenide-Nitrogen alloy developed at Sandia National Laboratory is said to have potential uses in electricity-generating solar cells. The new material is expected to have a longer life, and it is believed to have a 40% efficiency rate, which is nearly twice that of standard silicon solar cells. The useful life of a telecommunications satellite could be extended from 10 to 15 years by using the new solar cells. What rate of return could be realized if an extra investment now of $950,000 would result in extra revenues of $450,000 in year 11, $500,000 in year 12, and amounts increasing by $50,000 per year through year 15?
What will be an ideal response?
0 = -950,000 + [450,000(P/A,i*,5) + 50,000(P/G,i*,5)](P/F,i*,10)
Solve for i* = 8.45% per year (spreadsheet)
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A semicircular-sided tank is welded in the shop. The length of the tank’s bottom, shown in the figure, is 20”, and the radius is 5”. How long is the piece of metal used to form the sides of the tank, in inches? Round the answer to the nearest 1/16”.
Approximately _____ of the animals still used in testing are rats and mice
A) 30% B) 50% C) 70% D) 90%
List three reasons for irrigating turfgrass
What will be an ideal response?
Receptacles in dwelling bedrooms, family rooms, dining rooms, living rooms, parlors, libraries, dens, sunrooms, recreation rooms, closets, hallways, and similar areas on 15- or 20-ampere, 120-volt-rated branch-circuits are required to be protected by a(n) ___________________ of the combination type.
Fill in the blank(s) with the appropriate word(s).