This problem is an example of counting principles, since there are 8 questions and each questions has 5 choices with only one correct answer per question. So the number of ways the exam can be answered is 5 ways per question since there 8 questions
5 x 5 x5 x5 x5 x5 x5 x5 = 390625 ways
Answer:
43 46 34 98 78 67
Step-by-step explanation:
A =4πr2
10 weeks
20x+50=250
First subtract 50 from both sides, which gives you 20x=200
then divide 20 from both sides which gives you x=10
