Answer:
$16.7
Step-by-step explanation:
501 dollars/1 week·1 week/30 hours
The weeks cancel out leaving 501 dollars/30 hours which can be simplified to $16.7 per hour
15% = .15
add 1.00 to include the original amount
9 *(1+0.15) = 10.35
so $10.35
If 1mm = 500km then:
7000km/500km will give you your diameter of the drawing.
This means the planet drawing will have a diameter of 14mm