The initial volume of water in a certain pond is 2,000 m3. each day 0.5 m3 is drained from the pond.
what does the expression 2000−0.5x represent?
a) the volume of water in the pond after x days
b) the number of days it will take to completely drain the pond
c) the total volume of water drained from the pond during x days
d) the time it will take to drain half of the volume of water from the pond

Option A The volume of water in the pond after x days

Step-by-step explanation:

Let

y ------> the volume of water in the pond  

x -----> the number of days

we know that

The linear equation that represent this problem is

This is the equation of the line in slope intercept form

where

the slope is

the y-intercept is

----> initial volume of water in the pond

therefore

The expression represent

The volume of water in the pond after x days

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls