Give the answer straight out, please! Gwen, Emma, and Lotte were setting up a jump course for their friends to practice on their horses for a big show next weekend, Each jump had to be at least 1.1 meters tall. A) Gwen couldn't find a meter stick but she had a rock that was 14cm tall. How many "rocks tall" did the jump have to be? B) Emma used 1/3 of a 4 meter post to measure the height of the jump since she also couldn't find a meter stick. How much taller is the jump that Emma set than it should be? C) Lotte measured with her dog's leash that was 1.5 meters long. What percent of the leash will she have to use to measure 1.1 meters?

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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