exam Maths Puzzle Numerical Ability

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For the following set of data, test the hypothesis that the average is 10. Run a test of that hypothesis and present the conclusion.
x
8.9
9.7
10.3
8.5
10.4
9.3
9.8
7.1
10.6
11.1

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A lake resort owner rents a cabin for 14 days on the condition that he would recieve $40 for each day it didn't rain and $10 for each day it did rain. At the end of the 2
need help - want to make sure i did these correct!
Need standard form for the following (ellipses)
1. 3x^2-6x+y^2+8y-8=0
2. 4x^2-8x+5y^2-20y-4=0
ALSO
need vertices a