Here are the tips of 25 randomly selected patrons, measured in percent of total bill. 20.8 18.7 19.9 20.6 21.9 23.4 22.8 24.9 22.2 20.3 24.9 22.3 27.0 20.4 22.2 24.0 21.1 22.1 22.0 22.7 19.1 20.6 22.3 22.0 29.4 The standard deviation of tips is known to be 2.5. a) What is the 94% confidence interval for the mean tip of patrons if the distribution of tips is approximately Normal? b) What is the 98% confidence interval for the mean tip of patrons if the distribution of tips is unknown?

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proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc