Quincy folds a piece of cardboard to make the three sides of a triangular prism open at top and bottom. The triangular prism and the piece of cardboard that he used are shown below.
What is the area of the piece of cardboard?
460 square centimeter
540 square centimeter
500 square centimeter
563 square centimeter

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105

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

where is the picture

step-by-step explanation: