Me dieron este modulo debido a la cuarentena y no entiendo absolutamente nada. Les agradecería mucho si me ayudan.

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Debris produced by mining is called