2. The graph shows the height of an arch support for a railroad bridge. Height of Arch Support y 625 500 Height (ft) 375 250 125 X 0 5 10 15 20 25 30 35 40 45 50 55 Distance from North End (ft) Find the function rule and axis of symmetry of this parabola.​

the anwser is d) 75°

step-by-step explanation:

∠cbe and ∠deb are same-side interior angles.

i took the test

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