(0, 1500)

(0, 250)

(0, 500)

(0, 1000)

x- axis

y-axis

There are 500 bacteria when you begin observing.

The time is 500 minutes from when you begin observing.

There are 500 birds when you begin observing.

There are 500 cats when you begin observing.

About $632 billion.

About $770 billion.

About $550 billion.

About $708 billion.

$7,990.38

$4,475.53

$4,768.22

$5,760.42

$$y=12\cdot0.008^x$$

$$y=12\cdot0.3^x$$

$$y=10\cdot0.5^x$$

$$y=7\cdot0.03^x$$

(0,2)

(0,3)

(0.4)

(0,5)

y-axis

x-axis

75 kilopascals

80 kilopascals

50 kilopascals

70 kilopascals