Find the density (ing/cm3) of ametal cylinder with a mass of 8.3 g, a length (I) of1.94 cm, and a and a radius (r) of 0.55cm.Fora radius (r) cylinder, V=pi r2l pi =3.14 A 4.50206g/cm^3 B 1.41g/cm^3 C 4.5g/cm^3 D 1.24g/cm^3 Question 4 How many significant figures are in 1.000times 10^5s A 4 B 2 C 5 D 1

**Question 1:**<br /><br />First, calculate the volume of the cylinder:<br /><br />V = πr²l<br />V = (3.14) * (0.55 cm)² * (1.94 cm)<br />V = (3.14) * (0.3025 cm²) * (1.94 cm)<br />V ≈ 1.83 cm³<br /><br />Now, calculate the density:<br /><br />Density = mass/volume<br />Density = 8.3 g / 1.83 cm³<br />Density ≈ 4.5 g/cm³<br /><br />Therefore, the correct answer is C.<br /><br />**Question 4:**<br /><br />The number 1.000 x 10⁵ s has four significant figures. The zeros after the decimal point are trailing zeros in a number that contains a decimal point, and therefore are significant.<br /><br />So the correct answer is A.<br />