A curve on a highway has a 1000-foot radius with lanes that are 14-feet wide. If the curve makes a 180° turn, how much longer is the outside edge of the far lane than the inside edge of the close lane?

option C

Step-by-step explanation:

given,

α = 1 - 0.95 = 0.05

degree of freedom (df) = 17 -1 = 16

critical value (from t-table)

margin of error =

=2.120\times \sqrt{\dfrac{25.36^2}{17}+\dfrac{25.183^2}{17}}[/tex]

= 2.120 x 8.6467

= 18.33

Margin of error = 18.33

Point estimation of difference =

                                                  = 36.235

lower limit = 36.235 - 18.33 = 17.91

upper limit = 36.235 + 18.33 = 54.57

hence, the nearest option near to answer is option C