A fish tank contains 600 gallons of water when full. The tank contains a permanent hole, which causes the tank to leak at a
constant rate of 12 gallons each week. Let w be the number of
weeks. Which of the following expressions describe the number of
gallons left in the tank after any given number of weeks.

a. 600 + 12w
b. 600 - 12w
c. 12 -600w
d. 12 + 600w

600 - 12w

Step-by-step explanation:

From the question, we are informed that a fish tank contains 600 gallons of water when full and that the tank

contains a permanent hole, which causes the tank to leak at a constant rate of 12 gallons each week.

If the number of weeks is represented by w, then the expression that describe the number of gallons left in the tank after any given number of weeks will be:

= 600 - 12w

For example let's say the number of weeks is 5 weeks. Using the expression,

600 - 12w

= 600 - 12(5)

= 600 - 60

= 540 gallons

There'll be 540 gallons after 5 weeks.

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: