Is 78.50 is the same as 78.5

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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¯¯¯¯¯¯¯¯)?