Exponential growth and decay

Question 1

y = 30 × 1.1ˣ. Find y when x = 2. Round to 2 decimal places if needed.

Answer 

Question 2

Sofia's bacteria culture starts with 100 cells and doubles every 3 hours. How many cells after 12 hours?

Answer 

Question 3

Does y = 35(0.8)ˣ show exponential growth or decay?

• A. Growth
• B. Decay

Question 4

y = 32 × 2ˣ. Find y when x = 4. Round to 2 decimal places if needed.

Answer 

Question 5

Zara's bacteria culture starts with 500 cells and doubles every 2 hours. How many cells after 8 hours?

Answer 

Question 6

Does y = 62(2)ˣ show exponential growth or decay?

• A. Growth
• B. Decay

Question 7

y = 43 × 1.5ˣ. Find y when x = 4. Round to 2 decimal places if needed.

Answer 

Question 8

Ethan's bacteria culture starts with 160 cells and doubles every 3 hours. How many cells after 6 hours?

Answer 

Question 9

Does y = 68(1.2)ˣ show exponential growth or decay?

• A. Growth
• B. Decay

Question 10

y = 23 × 0.5ˣ. Find y when x = 3. Round to 2 decimal places if needed.

Answer 

Question 11

Ben's bacteria culture starts with 330 cells and doubles every 5 hours. How many cells after 5 hours?

Answer 

Question 12

Does y = 34(0.5)ˣ show exponential growth or decay?

• A. Growth
• B. Decay

Question 13

y = 49 × 1.1ˣ. Find y when x = 4. Round to 2 decimal places if needed.

Answer 

Question 14

Hiro's bacteria culture starts with 170 cells and doubles every 4 hours. How many cells after 16 hours?

Answer 

Question 15

Does y = 4(0.25)ˣ show exponential growth or decay?

• A. Growth
• B. Decay

Question 16

y = 9 × 1.5ˣ. Find y when x = 3. Round to 2 decimal places if needed.

Answer