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or
Step-by-step explanation:
If Alexa worked 30 hours last week and earned $450, then her hourly payment is
Her payment has now been increased by 20%, so her hourly payment becomes
If she worked h hours, then she earned If her new payment is p, then
or
Given that the diameter: d= 0.0625 inch.
So, radius of the wire : r = = 0.03125 inch
Now the formula to find the cross-sectional area of wire ( circle) is:
A = πr²
= 3.14 * (0.03125)² Since, π = 3.14 and r = 0.03125
=3.14 * 0.000976563
= 0.003066406
= 0.00307 (Rounded to 5 decimal places).
Hence, cross-sectional area of a wire is 0.00307 square inches.
Hope this helps you!