How many significant figures are in 0.04450 m? A 6 B 4 C 5 D 3 Question 2 Find the density, ing/cm3, of ametal cubewith a mass of 50.3 g andan edgelength (I) of 2.65 cm. For acube, V=13. A 6.33g/cm3 B 2.70g/cm3 C 19.0g/cm3 D 0.0222g/cm3

**Question 1:**<br /><br />The correct answer is **B 4**.<br /><br />* Leading zeros (the zeros before the first non-zero digit) are not significant. In 0.04450, the two zeros before the '4' are not significant.<br />* Trailing zeros (zeros after the last non-zero digit) in a number with a decimal point are significant. The zero after the '5' is significant.<br />* All non-zero digits are significant. The '4', '4', and '5' are significant.<br /><br />Therefore, there are four significant figures.<br /><br /><br />**Question 2:**<br /><br />The correct answer is **B $2.70 \, g/cm^3$**.<br /><br />Here's the solution:<br /><br />1. **Calculate the volume (V) of the cube:**<br /> V = l³ = (2.65 cm)³ = 18.61 cm³<br /><br />2. **Calculate the density (ρ):**<br /> ρ = mass / volume = 50.3 g / 18.61 cm³ = 2.70 g/cm³ (rounded to three significant figures, as justified by the given data)<br />