Awater well drilling rig has dug to a height of -15 feet in three hours. if the rig has been running constantly and is currently at a height of -192.5 feet, for how long has the rig been running? group of answer choices

answer: 38.5 hours

step-by-step explanation:

running constantly means the rate of change( gradient ) is constant. so this can be modelled with equation h = mt + c.(where h is height dug and t is time taken)

since you will start digging from the surface, y-intercept will be zero.

now it becomes h = mt.

now to find m, do -15/3 = -5 because to find the rate at which the well is being dug. now equation becomes h = -5t.

now,

-192.5 = -5t

-192.5/-5 = t

t = 38.5 hours

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles