Which equation can be used to calculate the area of the shaded triangle in the figure below? 4 ft
12 ft
(4 points)
2(12 x 4) = 96 square feet
Oa
Ob
1
2 (12 x 4) = 24 square feet
2(12 + 4) = 32 square feet
d
1
2 (4 + 12) = 8 square feet

92 POINTS

Step-by-step explanation:

Using rectangle area formula and considering half of it as shaded:

Given

The area is:

Correct option is b.

step-by-step explanation:

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