The grand canyon is enormous. it is 433 km long and has an average depth of 1.6 km. the us forest service estimates its volume at 4.17 trillion (4.17*10^12) m3. suppose dump trucks are lining up to fill the grand canyon. a small dump truck can carry approximately 20.5 m3 of sand. suppose also that they can dump one load every 30 seconds. how many years would it take to fill the grand canyon?

Answer

193429.73 years

Explanation:

Estimated volume of the grand canyon is 4.17 trillion

Capacity of truck is 20.5

It takes 30 seconds to deliver 1 load

number of loads that can fill up the Grand Canyon is

Time taken to deliver the needed number of loads is

Next, we convert the result from seconds to years:

Number of seconds in a year is

365 days x 24 hours x 60 minutes x 60seconds = 31536000

Time taken in years =    

12*c

step-by-step explanation:

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.