<span>1.The y-coordinate of a point tells how far to move up or down from the origin along the y-axis.2. The pitch is the slope. Pythagoras theory have to be known, as well as what an hypotenuse is.You must know how to work with exponents. 3.Yes 4. when construction wheelchair ramps, slope is a major consideration.</span>
When you write it as an inequality you get x + 4 > 13
The height of the ladder is 20.6 feet. Option C shows the correct height of the ladder.
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How do you calculate the height of the ladder?</h3>
Given that the length of the ladder is 21 feet. The bottom of the ladder was placed 4 feet from the base of the building.
The attachment shows the arrangement of the ladder. The attachment shows a right-angle triangle in which the value of base and hypotenuse is given. The length is given as below.




Hence we can conclude that the height of the ladder is 20.6 feet. Option C shows the correct height of the ladder.
To know more about the right-angle triangle, follow the link given below.
brainly.com/question/3770177.