It depends on what the "ideal" angle is.. the angle that it's propped up against the wall.
A small angle < 45° will get more height but falling backwards off the ladder is more probable. An angle > 45° get's much less height and get's more unsafe the closer to 90° it becomes. I guess you should go with 45° as the ideal angle.
Then the ladder just makes a right triangle with the building.
Opposite side is the height, Hypotenuse is the ladder length.
Soh Cah Toa
Sin(45°) = (height) / (10 ft)
10 × Sin(45°) = height
7.07 ft
Answer:
21
Step-by-step explanation:
Since the order of the essays isn't important, the number of ways you can choose 2 from 7 is:
₇C₂ = 7! / (2! (7−2)!)
₇C₂ = 7! / (2! 5!)
₇C₂ = 7×6×5! / (2×1 × 5!)
₇C₂ = 7×6 / 2
₇C₂ = 21
(x^2 - 4^2)^2 = x^4 - 4^4
(x^4 - 4^4) (x^2 + 4^2) = x^2 - 4^6
The Angela's solution is wrong cause when you multiply you get a different answer.
Answer:
hmm...
Step-by-step explanation:
Answer:
B. 
Step-by-step explanation:
Let l represent length of rectangle and w represent width of rectangle.
We have been given four formulas for the perimeter of rectangle. We are asked to choose the formula that displays a common student error for finding the perimeter.
We know that perimeter of a polygon is sum of all sides of the polygon. We also know that rectangle is polygon having two sets of equal sides.
The perimeter, P, of rectangle will be sum of its all sides that is:
Combine like terms:
Factor out 2:
Upon looking at our given choices, we can see that formula represented by option B displays a common student error for finding the perimeter.
