<span>Number part = <span>3.3 </span></span>and
<span>Exponent part = -7</span>
<span>3.3*<span>10<span>−7</span></span></span>
35714286/1000000000, simplified is <span>17857143/500000000.</span>
Answer:

Step-by-step explanation:
<u>Formula for circumference of a circle is</u>:
Circumference = 
<em>Given circumference of the ring is
</em>
<em>Now solving for the radius gives us:</em>

We know that area of a circle is
, substituting the value of r we found, we get the area as:
area (A) = 
Hence the Area (A), in terms of
is
Answer: £51
Step-by-step explanation:
25% off 49 = 36.75
25% off 19 = 14.25
36.75 + 14.25 = 51