An air traffic controller is monitoring two small planes flying at the same altitude. One is flying towards the control tower from the west at
120 miles per hour and is currently 5 miles away from the tower. The
other plane is now on top of the tower and flying south at 150 miles per
hour. In order to respect local safety rules, the planes have to be always
more than 4 miles from each other or fly at different altitudes. Should
the controller order one of the planes to change altitude, or will they
always be farther than 4 miles from each other?

yyes other

Step-by-step explanation:

the correct is answer is a 9-sided polygon!

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