Answer:
6:20
Step-by-step explanation:
One hour less of 7:30 is 6:30 -20 min= 6:20
There are a total of 48 students so what we do is divide by 4. Then you just multiply times the 3/4 left. We get 48 divided by 4 to be 12. So 12 times 3 is....36. 48-36=12. 12 girls.
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For number 6, use the equation S= a1/1-r which is basically s=210/1-(1/10). The answer is 233