The conversion factor relating miles to meters is 1mile=1610m. the speed of light is 3.00×108 m/s. how fast is this in miles per hour (miles/h)?

Speed of light = 3.00 x 10^8 m/s

1 mile = 1610 m, it implies that 1 m = 1/1610 mile

1 s = 1/3600 hour

Speed of light = (3.00 x 10^8 x (1/1610) mile) / (1/3600) hour

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