What is 800 is 10 times as much as what number

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 equations in logarithmic form 7^3=343

The length of the shadow of a building is 120 meters, as shown below: building shadow 120 m what is the height of the building? (1 point)