Um observador, situado num ponto O da margem de um rio, precisava determi- nar, sem atravessar o rio, sua distância até o ponto P, localizado na outra margem. Para isso, marcou com estacas outros pon- tos do lado da margem onde se encontrava, de tal forma que P, O e B ficaram alinhados entre si e P, A e C também. Sabendo que OA é paralelo a BC, OA = 25 m, BC = 40 m e OB = 30 m, qual é a distância, em metros, do observador em O até o ponto P?

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.