Answer:

Step-by-step explanation:
The missing details in the question are:


Required
The perimeter
This is calculated as:

So, we have:

Open bracket

Rewrite as:

The buttonhole size needed to fit the button is 3cm.
The solution is as follows:
Solve for d when C = 9.42 cm=2πr
d = 2r
r = C/2π = 9.42 / 2π
r = <span>1.49923956393
d = 2(</span>1.49923956393) = <span>2.99847912785 or <span>3cm
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Answer:
78
Step-by-step explanation:
if you flip it upside down it is in numerical order starting from 86. filling in the blank then flipping the number upside will result in the answer being 78. if not the then idk bro