A Markup Building a Truss
- Comment
The figure shows part of a common roof design using a very strong and stable triangular truss. Points B, C,D, F,G,1,
and Jare midpoints of AC, AE, CE, GE, HE, AH, and Al respectively.
T Text Box
• Equation
B
2881
m
Truss: the
frame of a
roof
Drawing
20 ft
4ft
Shapes
Eraser
Add Media
14 ft
• Signature
If AE = 28 feet, then how much lumber, in feet, would be needed to build the following truss? Label both the
diagram and the equation below in order to find the total necessary. (3 points)
+
20 + 14 + 28 +
AH HE AE DF
DG
CG
CH
IC
IB
JB
1
«

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

explanation:

step-by-step explanation: