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Sjanaya853
24.09.2019 •
Mathematics
The probability that shania is on time for school is 1/2 , find the probability that shania arrives on time for school for the next 5 days. express your answer as a percent, to the nearest tenth of a percent
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Ответ:
P()=(P(T))^5
P(T)=1/2 so
P()=(1/2)^5
P()=1/32
P()=3.125%
Ответ:
Step-by-step explanation:
1) 2^1 = 2, 2^2=4, 2^3=8 2^4=6 2^5=2 .. we can find out a pattern: 2,4,8,6,2,4..
so 2^30 (mod 10) = 2^2 (mod 10) = 4
2) similar to Q1, 7^1 = 7, 7^2 = 9, 7^3 = 3, 7^4,=1, 7^5 = 7, the pattern is: 7,9,3,1,7.. so 7^28 = 7^4 = 1
3) since any power of 5 is equal to 5, (5^2005)-5 (mod 10) = 5-5 = 0
4) since any power of 1 is equal to 1, and there is a pattern for the power of 4 that is 4,6,4,6.. so (11^2005)-4^2005 = 1 - 4 (mod 10) = 7
5) 8's pattern is 8,4,2,6 and 3's pattern is 3,9,7,1, so (8^15)-3^7 = 2 - 7 = 5
6) 3's pattern is 3,9,7,1, so (3^75) (mod 10) = 7