Uma máquina vale hoje R$200:000, e esse valor decresce exponencialmente a uma taxa k por ano. Se daqui a 4 anos seu valor for R$180:000; 00. Qual o valor
de k?

The length of each stair is 11 inches. what is the rise, r, for each stair? round to the nearest inch. 2 inches 7 inches 17 inches 24 inches

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.