The area of a trapezoid is found using the formula a=1/2h(b^1+b^2), where b^1 and b^2 are the parallel sides of the trapezoid and h is the height. the area of a trapezoid is 18km^2 , with bases 5 km and 7 km. what is the height, in

40

Step-by-step explanation:

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a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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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