Ascuba diver is 72 feet below sea level .as the diver rise he stops every 15 feet what integer tells his depth after the first pause?

What is the square root of 45? (step by step working plz)

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¯¯¯¯¯¯¯¯)?

What’s the answer ? use the picture to see the problem