Jt engineering is deciding between two machines. Machine a costs $352,000, with revenues of $209,000 and expenses of $154,000. Machine b costs $380,000, with revenues of $231,000 and expenses of $166,000. Both have a 10-year life and no salvage value. Jt uses the straight-line method for depreciation and requires a return of 12%. How desirable are the machines? use the annual rate of return to determine the answer.

The smokey mountains have over 2,100 miles of rushing mountain streams and rivers that flow through the park. in each mile lives a diverse community of native fish, amphibians, insects, and larvae, some of which are found only in the southern appalachians. park managers and scientific researchers test many factors such as fish populations, the watersheds and water tests to determine a) too many lizards are present b) the water quality of the stream c) rainwater is running into local streams d) if visitors to the park are overstaying their welcome

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity

A(t)=(t−k)(t−3)(t−6)(t+3) is a polynomial function of tt, where kk is a constant. given that a(2)=0a(2)=0, what is the absolute value of the product of the zeros of aa?