Mary rent a truck from a truck-rental company that charges a flat fee of $20 and $5 per hour.
if mary rents the truck for h hours, the expression that shows the amount she has to pay is if she rents the truck for 25 hours, the total amount she has to pay is

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¯¯¯¯¯¯¯¯)?