Keisha is competing in a long bike race. The table below shows her distance left to the finish line at different time
Time
Distance
After 1 hour 54 miles
After 2 hours 41 miles
After 3 hours 28 miles
After 4 hours 15 miles
Fill in the blanks below.
With each additional hour, the distance left ((Choose one)
by miles.

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Write the fraction or mixed number and the decimal shown by the model

The longer leg of a 30-60-90 trangle is 18