La frecuencia del silbato de una locomotora de tren es de 348 Hz. El tren viaja con una velocidad de 35m/s. ¿Qué frecuencia percibe un observador en reposo cuando el tren se acerca? ¿Qué frecuencia percibe cuando se aleja?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

15/16 as a decimal rounded to the nearest hundredth