12. what percent of 75 is 45? show your work.

Method 1:

45 is 60% of 75.

Method 2:

what percent of 75 is 45

  n     ÷ 100    *   75 = 45

  n                  * = 45

  n              * = 45

 n                              =  

 n                              = 60

60%

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

486in is correct

step-by-step explanation: