Astronomers deal with objects in space, so it's most likely they would use geometry to determine how far they are, how big they are, etc.
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Answer:
associative property of multiplication
Step-by-step explanation:
You cant rlly explain, you just have to know your properties
Answer:
Step-by-step explanation:

The numerator of the rational expression the money he earned for 'x' hours
The rate at which William is paid for each hour in excess of 40 hours 24.
x = 50 hours = (40 + 10 ) hours
The amount paid for excess 10 hours = 24 *10 = 240
Total amount earned for the week = 480 + 240 = 720