Atank with a flat bottom is filled with water to a height of 4 meters. what is the pressure at any point at the bottom of the tank? (you can ignore atmospheric pressure when calculating your answer.) a. 18.9 kpa b. 39.2 kpa c. 4.0 kpa d. 9.8 kpa

Option D

Because Pressure= Weight of Water

= Height x G

=4x9 . 8

=39.2kPA

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

d. air pressure decreases as altitude increases.