1.6 Approximation and error Quiz

1. $x=4.1$ correct to 1 decimal place. Which inequality gives the possible values of $x$?

• A. $4.0\leq x<4.2$
• B. $4.05<x\leq4.15$
• C. $4.05\leq x<4.15$
• D. $4.1\leq x<4.2$

2. Round $0.004567$ to 2 significant figures.

• A. $0.0046$
• B. $0.0045$
• C. $0.00457$
• D. $0.0050$

3. The true value is $12.5$ and the approximate value is $12.0$. Find the percentage error.

• A. $0.5\%$
• B. $4.17\%$
• C. $0.04\%$
• D. $4\%$

4. Which is the best estimate of $48.7\times2.1$?

• A. $10$
• B. $100$
• C. $1000$
• D. $50$

5. A mass is $3.2$ kg correct to 1 decimal place. What is its upper bound?

• A. $3.25$ kg
• B. $3.2$ kg
• C. $3.24$ kg
• D. $3.3$ kg