Question

devon got a pet lizard for his birthday. he measured the length of it in three consecutive months. use the rulers to answer the questions. write each answer as a whole number or decimal (not a fraction). (a) how much longer did the lizard grow from one month to the next? □ inches (b) at this rate, how long will the lizard be in month 12? □ inches

Explanation:

Part (a)

Step 1: Find lengths in each month

From the ruler, Month 6 length: Let's assume the ruler is in inches. Looking at the first ruler, the lizard's length in Month 6 is at 32 inches (assuming the scale: let's check the markings. Wait, maybe the initial point? Wait, the ruler starts at 26? Wait, no, maybe the lizard's head is at: Month 6: let's see the first lizard, the mark is at 32? Wait, maybe Month 6: 32 inches, Month 7: 34 inches, Month 8: 36 inches? Wait, no, let's re - examine. Wait, the first lizard (Month 6) has its head at 32? Wait, maybe the ruler is marked with numbers. Let's assume:

Month 6 length: 32 inches (from the ruler, the mark is at 32)

Month 7 length: 34 inches (the second lizard's head is at 34)

Month 8 length: 36 inches (the third lizard's head is at 36)

Step 2: Calculate growth per month

Growth from Month 6 to Month 7: \(34 - 32=2\) inches

Growth from Month 7 to Month 8: \(36 - 34 = 2\) inches

So the lizard grows 2 inches from one month to the next.

Step 1: Determine the length in Month 8 and the number of months to Month 12

Length in Month 8: 36 inches

Number of months from Month 8 to Month 12: \(12 - 8=4\) months

Step 2: Calculate growth in 4 months

Since the growth rate is 2 inches per month, growth in 4 months: \(2\times4 = 8\) inches

Step 3: Calculate length in Month 12

Length in Month 12: \(36+8 = 44\) inches

Answer:

2

Part (b)