Approximations, Decimal Places and Significant Figures - Questions

Question 1
29390

Evaluate \(\sqrt {{{4.1}^2} + {{1.7}^2}} \) correct to 2 decimal places

\(4.44\)

\begin{aligned}
\sqrt{4.1^{2}+1.7^{2}} &=\sqrt{19.7} \\
&=4.4384 \ldots \\
&=4.44
\end{aligned}

Question 2
10573

\(\sqrt {0.0057} \) correct to 3 significant figures is?

0.0755

Question 3
10577

145086 correct to two significant figures in standard notation is?

\(1.5 \times {10^5}\)

Question 4
10582

0.002376 correct to 3 significant figures in standard notation is?

\(2.38 \times {10^{ - 3}}\)

Question 5
10584

\(1.75 \times {10^3}\) in normal decimal form is?

1750