A woman drives an SUV that gets 15 min//gal (mpg). Her husband drives a hybrid that gets 60mpg. Every week, they travel the same number of miles. They want to improve their combined mpg. They have two options on how they can improve it. Option 1: they can see tune the suv and increase its mileage by 2 mpg and keep the hybrid as it is. Option 2 : they can buy a new hybrid that goes 80mpg and keep the SUV as it is. Which option will give them a better combined mpg?

the answer is 0.000652422

but if you ment to ask what is 6131 divided by 4, it is 1532.75.

step-by-step explanation:

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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