This is a great example of a word problem with way too much information. You have to decipher the important info. Since you are asked to discover the hourly rate, you only need to worry about the last example (and the fact that a trip fee is $45).
Let's set it up: (Let H represent the hourly wage)
$303 = (6H) + $45 (Move both dollar amounts on the left side and leave 6H on the right)
$303 - 45 = 6H (Subtract the money on the left)
$258 = 6H (Divide 258 by 6)
$43 = H
6,920 hope this helps you :p
So the formula for the circumference of a circle is π x diameter
Since we know the the circumference already, we just divide that by π:
12π / π = 12
Now we halve the diameter to get the radius:
12 / 2 = 6
The area of a circle is π x radius²
So the area is:
·π x 6² = 36π· (or 113 not in terms of π)
If he has $75 and need $93 to make the purchase, he needs to find the difference between what he needs and what he has:
93 - 75 = 18
He needs to borrow $18 to make the purchase.