Answer:
23
Step-by-step explanation:
The sum of any two sides of a triangle has to be greater than the other side
Only 23 meets this criteria
10 x 8 = 80ft for the rectangle
To work out the area of the semi circle you do pi (3.14) x the radius squared, the radius is half the diameter.
3.14 x 4 squared
3.14 x16 = 50.24ftsqaured for the whole circle so you divide it by 2 which is 25.12ft squared.
And then finally you add 25.12 and 80 so your answer is 105.12 ft squared
9. The decrease in population for Lakeside 5,500.
You can find this by taking the new amount and subtracting the original amount. This will give you the net change.
new - old = net change
45,800 - 51,300 = net change
-5,500 = net change
10. The percent increase for Riverview is +51%.
You can find that by looking at the formula for percent change.



51%