What are the answers to the letters and how did you get that?

Step-by-step explanation:

You need to take advantage of what you have learned about inscribed angles. Each inscribe angle is half the measure of the arc it intercepts. Of course, the sum of all arcs around a circle is 360°.

Putting these facts together, you can quickly conclude that opposite angles of an inscribed quadrilateral are supplementary:

  a = 180 -110 = 70

  b = 180 -102 = 78

The arc (c+81) is opposite the inscribed angle marked 110, so we have ...

  c + 81 = 2(110)

  c = 220 -81 = 139

The arc (c+d) is intercepted by the angle marked b, so we have ...

  139 +d = 2(78)

  d = 156 -139 = 17

The arc (e+81) is intercepted by the inscribed angle marked 102, so ...

  e +81 = 2(102)

  e = 204 -81 = 123

The inscribed angle f intercepts arc c, so is half its measure.

  f = 139/2 = 69.5

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles