CNC machines are often used to make parts directly from solid modeling software. What does CNC stand for?
a. central navigation center
b. computer navigation center
c. computer nominally controlled
d. computer numerically controlled
d. computer numerically controlled
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Two-dimensional Poisson process. The number of plants of a certain species in a certain forest has a Poisson distribution with mean 10 plants per acre. The number of plants in T acres therefore has a Poisson distribution with mean 10T.
a. What is the probability that there will be exactly 18 plants in a two-acre region?
b. What is the probability that there will be exactly 12 plants in a circle with radius 100 ft? (1 acre = 43,560 
.)
c. The number of plants of a different type follows a Poisson distribution with mean ? plants per acre, where ? is unknown. A total of 5 plants are counted in a 0.1 acre area. Estimate ?. and find the uncertainty in the estimate.
The discoveries of ________ provided the mechanism that was needed for Darwin's theory of evolution
A) Luther Burbank B) Alphonse DeCandolle C) Carolus Linneaus D) Gregor Mendel
A vehicle with TPMS has the tire pressure warning light on steady. The owner says that all 4 tires have the correct pressure. Technician A says that the spare tire pressure could be low. Technician B says that a sensor may be bad. Who is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
What can happen if you do not purge with nitrogen while brazing?
A) You run the risk of an explosion. B) Oxides inside the pipe can come loose and contaminate the system. C) Leak checking will take longer. D) The brazing will take longer without the extra heat from the nitrogen.