Answer:
18/25
Step-by-step explanation:
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Answer: OPTION D.
Step-by-step explanation:
The formula for calculate the circumference of a circle is:

Where <em>r</em> is the radius.
The formula for calculate the area of a circle is:

Where <em>r</em> is the radius.
Solve for <em>r</em> from
to calculate it:

Subsitute the radius into
. Then:

Answer:
x=16
Step-by-step explanation:
50+40=90
40-8=32
32/2=16
x=16