Answer:

Step-by-step explanation:
step 1
Find the circumference of the complete circle
The circumference is equal to

we have

substitute


step 2
Find the measure of the arc length for a central angle of 280 degrees
Remember that the circumference subtends a central angle of 360 degrees
so by proportion

step 3
Find the perimeter of the playground

Multiply by 3

Round to the nearest integer

See attached picture for graph
Answer:
25.5
Step-by-step explanation:
first find angle E.
remember, all angles in a triangle always add up to 180 degrees.
E = 180 - 90 - 20 = 70 degrees
now we use the law of sines.
ED/sin(20) = DC/sin(70) = EC/sin(D)
EC = x
sin(D) = sin(90) = 1
24/sin(70) = x/1 = x
x = 25.5
Total interest= principal*interest rate*time
I=500×0.023×4
I=46