What led to the development of the global positioning system
a.) the need to perform complex calculations
b.) launching a us satellite as a competition to sputnik
c.) tracking of sputnik through radio waves
d.) the need for safe disruption of information

Sheri likes to study in the school library, but it is usually full of chatting students. it's a great place to study because her friends can always drop by when they want to talk to her. sheri should seek a new study space with a. more light c. less distractions b. less people d. more access to a restroom select the best answer from the choices provided a b c d

When your organs don't receive enough blood, they begin to a. shut down b. speed up c. inflame d. dry out

How much hazardous chemical waste is produced per year in the us? a) 25 million metric tons b) 100 million metric tons c) 250 million metric tons d) 700 million metric tons e) 950 million metric tons