C. 17.7 cm this is correct I just had this question on my work and this is the answer
I do not understand ur language I speak English very well sorry I can't help you with your homework
Answer:
16 problems.
Step-by-step explanation:
100% divided by 20 questions.
100/20 is equal to 5, therefore each question is worth 5 points.
Grade of 80% divided by points per question.
80/5 is 16 so the student answered 16 questions correctly.
Answer:


Step-by-step explanation:
1. 



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2. 



Answer: 14.06 = 143/50
Your welcome