16π yards²To make things a little simpler to start off, convert the angle of the sector AEB into radians. It's 90 degrees, which is equivalent to π/2 radians.
Plug π/2 into the formula for finding the area of a sector, along with the value of 8 for r, the radius:

(angle in radians)

When you simplify that down, you get A = 16π so the answer is
16π yards²
Lynn mixes 39 pounds of water with 48 pounds of brick dust, so the mixture has a total weight of 39 + 48 = 87 pounds.
13 pounds are spilled during mixing, so she's left with 87 - 13 = 74 pounds to turn into bricks.
7 pounds are needed for 1 brick, so she can make 10 bricks because 7 • 10 = 70 and 7 • 11 = 77, and 70 < 74 < 77.
If she uses the mixture to make 10 bricks, she uses up 70 pounds of it, which leaves 4 pounds to be washed out.
Answer:
3600(seconds) can also be expressed as 1(kilometer/hour) = 5/18 (meters/second), which is its simplified form. To convert km/h to m/s, directly multiply the given value of speed by the fraction 5/18.
Step-by-step explanation:
I think that explanation is obvious
12% = 12/100 = 0,12
0,12 x x = 9
x = 9/0.12
x = 75
9 is 12% of 75
So 60 by 80,
60 <80 so 60=width
she moves it so that width=300
findn height
60:300=80:x
60/300=80/x
muliplyb oth sides by x
60x/300=80
x/5=80
mulitpliy both sides by 5
x=400
the height=400 mm