How many ways can the books " algebra ", booleans", contemporary", differentials", "euler's methods", "fermat's work", and "great mathmaticians" be arranged on the shelf ?

What kind of bond pays interest which is exempt from tax?

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¯¯¯¯¯¯¯¯)?

You can find the constant of proportionality by finding the ratio of