If Jack weighs more that Jill, and they run up the same hill, who has done more work? If Jack and Jill weigh the same, and Jill runs up the hill in half the time as Jack, who had more power??

1. Jack, because he weighs more and has to use move power to move.

2. Jill

Step-by-step explanation:

omg lol. Okay well for the first one the answer is jack does more work going up the hill.

For the second one Jill has more power.

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

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step-by-step explanation:

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