He has 28 blue marbles 15+12-55=28
Answer:

Step-by-step explanation:


Answer:
37.5 Gallons will be used after a 15-minute shower.
50 Gallons will be used after a 20-minute shower.
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Sin 20 = 1.8/hypotenuse
hypotenuse = 1.8 / sin 30 = 2.34 m
answer: 2.34m
The answer is 93692843993747338