Chris is standing 40m from the base of a cliff and noted that the height of the cliff was 70m. What was the angle at which he was looking up? Assume his eye level is 1m above the ground. ​

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

∡ eia and ∡ kij are congruent

step-by-step explanation:

n=1.75+1.75

step-by-step explanation:

3.5/2=1.75