The z-score for 81 is 1.75
<h3>How to determine the z-score for 81?</h3>
The given parameters are:
μ = 60 , X=81, and σ = 12
The z scores is calculated using:

Substitute the given values

Evaluate the difference

Simplify
z = 1.75
Hence, the z-score for 81 is 1.75
Read more about z-scores at:
brainly.com/question/25638875
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To find the volume of a triangle we need to do base x height we can see that the base is 13m and the height is 6m so the answer would be
13m x 6m = 78m
Answer:
(1)C- Trapezoid
(2)D-20 square feet
Step-by-step explanation:
<u>Question 1</u>
A cross-section of a rectangular pyramid cut perpendicular to the base but not passing through the top will have two parallel sides where one of the sides will be longer. Therefore, the shape which describes the cross-section will be a trapezoid.
<u>Question 2</u>
The base of the Triangle = 5 feet
Height of the Triangle = 8 feet

Step-by-step explanation:

Least common denominator is 10