Answer:
(a) P = 2x + 2r + 2πr
(b) x = ½(P - 2r - 2πr)
(c) x = 123 feet
Step-by-step explanation:
See Attachment for sketch of the track
Solving for (a): Perimeter of the track
This is calculated by adding the perimeter of the rectangle to the 2 semicircles as follows.
P = Perimeter of Rectangle + Perimeter of 2 Semicircles
P = 2(x + r) + 2 * πr
[Where r is the radius of both semicircles]
Open bracket
P = 2x + 2r + 2πr
Solving for (b): Formula for x
P = 2x + 2r + 2πr
Make x the subject of formula
2x = P - 2r - 2πr
Divide both sides by 2
x = ½(P - 2r - 2πr)
Solving for (c): the value of x when r = 50 and P = 660
Substitute the given values in the formula in (b) above
x = ½(P - 2r - 2πr)
x = ½(660 - 2 * 50 - 2π * 50)
x = ½(660 - 100 - 100π)
x = ½(560 - 100π)
Take π as 3.14
x = ½(560 - 100 * 3.14)
x = ½(560 - 314)
x = ½ * 246
x = 123 feet
The inventory account expected to have by December 31 is more than $5800. Option C
<h3>How to calculate the end inventory</h3>
The formula for end inventory is given as ;
Ending inventory = Beginning inventory + net purchases –sales
Beginning inventory = $5800
Net purchases = $65000
Sales = $112000
Put into the formula
Ending inventory = $ 
Add first,
Ending inventory = $ 
Ending inventory = $ -41, 200
Thus, the inventory account expected to have by December 31 is more than $5800. Option C
Learn more about ending inventory here:
brainly.com/question/24868116
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Step-by-step explanation:
hope this helps you out with the problems
Answer:
81=6x+3(vertically opposite angle are equal)
81-3=6x
78=6x
x=13°
hope it helps.