17. Explain The grid in this model represents 1. What decimal does the shaded part represent? Explain.​

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¯¯¯¯¯¯¯¯)?

The value of cos 30° is the same as which of the following?

Witch sequence shows a pattern where each term is 1.5 times the previous term