Bonus problem. Find the ratio a :b if it is given that 3a=8b​

Step-by-step explanation:

To find the ration, we want to get in equation in the form .

We can start by dividing by b on both sides:

3a = 8b

÷b     ÷b

Now, we can divide by 3 on both sides to get:

We can change the format into a ratio:

im not quite sure if this is right but i got 5.6 oisutuve

step-by-step explanation:

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