How would a knowledge in conversion of fraction to decimal or percent, and vice versa help you in your future career?

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¯¯¯¯¯¯¯¯)?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?