You just need to plug in 8 for x and the answer would be 77
1.(√3)+(√2)
2.(√2)+(√5)
3.(√5)-(√3)
4.(√9)+(√2)
5.(√5)+(√4)
6.(√10)-(√3)
7.(√4)-(√2)
Cuz √[(a+b)±2√(ab)]=(√a)±(√b)
130 miles is the actual distance between the two cities.
Answer:
Step-by-step explanation:
<u>Properties used</u>
Answer:
57.885
Step-by-step explanation:
For such calculations a probability calculator is very helpful. The one in the attachment shows the 87th percentile to be 57.885.
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A table of the standard normal distribution will tell you the 87th percentile corresponds to a z-value of 1.12639. Then the X value is ...
X = Zσ +μ = 1.12639(7) +50 = 57.885