Answer:
A). thickness are correct
Answer:
She will need approximate
of plastic border
Step-by-step explanation:
we know that
The circumference of a circle is equal to

In this problem we have

substitute
----> exact value of the length of plastic border
assume

---> approximate value of the length of plastic border
We have a right triangle with hypotenuse 38 and leg 34.
We want to find the other leg.
We use the Pythagorean Theorem:
Just count the zeros at the left. In your case <span>6
</span> so your number equals <span><span>0.428⋅<span>10<span>−6</span></span></span>
</span> and in scientific <span>4.28⋅<span>10<span>−<span>7</span></span></span></span>
187 over 20 is the answer