Answer:
Step-by-step explanation:
Hope it will help you a lot.
0.1 decrease in 15 minutes
unit rate is 0.1 / 15 = 0.00667
Temperature is decreasing by 0.00667 degrees Celsius per minute
15(.20)= 3 marbles are blue.
15(1/3)= 5 are green
15(.20)= 3 are yellow
3+5+3=11 marbles
15-11= 4 that means the rest of them are red.