Un faro 16 metros de altura manda su luz a una distancia de 54 metros. ¿Cual es la longitud del rayo de luz?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?