Pretty sure its 58, because i think you find it by multiplying the 4 inches by 14.5 because that's what each inch represents, so if this is wrong I'm sorry, but I'm pretty sure its 58.
Correct answer should be= 1.5 hours.
.68
.................................................
0.368 in expanded form would be...
0.000 + 0.300 + 0.060 + 0.008
or simply
.3 + .06 + .008