uma estação de tratamento de água pode filtrar cerca de 350.000 galões de água em sete dias. Nesse ritmo, cerca de quantos galões de água podem ser filtrados em trinta dias?

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¯¯¯¯¯¯¯¯)?

What describes horizontal cross section of the right rectangle 6m 8m 5m

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.