Trigonometry please help me

0.9

Step-by-step explanation: This is for the first one. Multiply cos by 24 and you get 0.913 round to .9

14 km

Step-by-step explanation:

Hiked in the morning: h

Hiked in the afternoon: 6

                                     25% less than in the morning  

                                         (less than means subtract from the morning)

                                6 = h-25%h

  6 = h - .25 h

Combine like terms

 6 = .75h

Divide each side by .75

6/.75 = .75h/.75

8 =h

She hike 8 in the morning and 6 in the afternoon for a total of (6+8) =14