12. a) write the precise definition of the greatest common divisor of two integers. b) write the precise definition of the greatest common divisor of three integers. c) generalise, write the precise definition of the greatest common divisor of k integers, where k 2 2 is an integer.

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

salary

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