Acar travels 162 miles in 3 hours. how far does the car travel in one hour?

54 miles in one hour.

Step-by-step explanation:

A car travels in 3 hours = 162 miles

We have to calculate the speed of car in one hour.

Therefore, we use the formula of speed =

                                                                   =

                                                                   = 54 miles/hour

The car travels 54 miles in one hour.

24 units

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