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
</span></span>
Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more.
Step-by-step explanation: In order to calculate the sales tax rate you need to divide the amount of sales tax by the amount of the purchase. In this case you divide .20 by $4.00. .2 / 4 = .05 = 5% sales tax rate
