Answer:
The area of the figure is 63.25 square feet
Step-by-step explanation:
we know that
The area of the figure is equal to the area of semicircle plus the area of triangle
step 1
Find the area of semicircle
The area of semicircle is

we have
----> the radius is half the diameter

substitute


step 2
Find the area of the triangle
The area of triangle is equal to

we have

substitute


step 3
The area of the figure is equal to

substitute

The area of the triangle could be determined by multiplying the length and the width. Since, we are given the area and the length, to find the width, you divide the area by the length:
w = A ÷ l
w = (x2 - 2x - 15) ÷ (x+3)
What do you have to multiply to (x+3) to yield x2 - 2x - 15? That would be x - 5. Since the sum of -5 and 3 = -2 (middle term) and the their product is -15 (last term).
Hence, the width is (x-5).
Hey there! :)
Answer:

-1/5n + 7 = 2
Start by subtracting 7 from both sides:
-1/5n + 7 - (7) = 2 - (7)
-1/5n = -5
Multiply both sides by the reciprocal of -1/5, or -5.
(-5) · (-1/5n) = (-5) · (-5)
n = 25
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Hi friend
3868000000 in scientific notation is : 3.868* 10^9
I hope that's help:) Please rate
If you have any further questions please let me know.Thx