Answer
a) $5.87\times10^{12} mi$
b) $2962.66 cm$
c) $98.43\times10^6 ft/s$
Work Step by Step
a)
1 light year = 365 days= 31536000 s
speed of light= $3\times10^8 m/s$ =$186282 mi/s$
$t=31536000 sec$
$V=186282 mi/s$
$d=V\times t$
$=31536000 \times 186282$
$\approx 5.874589152\times10^12mi$
$=5.87\times10^12 mi$
b)
$1 yard = 91.44 cm$
$32.4 yards = 32.4 times 91.44$
$\approx 2962.656 cm$
$= 2962.66 cm$
c)
$1 cm/s = 32.81\times10^{-4} ft/s$
$3\times10^10 cm/s = (3\times10^10)\times(32.81\times10^{-4})
$=98.43\times10^6 ft/s$
