6.04*102 light years
The nearest supernova, or more correctly supernova remnant is the Vela [See Link]. It occurred around 11 - 12,000 years ago. Not only is it the oldest, but it is also the closest at about 800 light years.
604
Acres are an area measurement you do not have "square acres". Greece has an area (according to Wikipedia) of 32 604 160 acres
Take a look at Metal Building Group. They have pre engineered metal buildings for pretty much everything. Here is their info: #404 - 19837 Telegraph Trail Langley, BC, Canada Humphrey Buildings Inc. Toll Free: 1-877-882-5911 Tel: 604-882-5911 Fax: 604-882-5925
Gujarat - longest coast line 1600 km, dotted with 41 ports; 1 major, 11 intermediate and 29 minor ports. Andhra Pradesh is the second longest coast line 972 km (604 mi)
6.04*102 ly
There is little point is writing it in scientific notation since that is longer and more cumbersome that the given number. However, it is 6.174 798 604 *109.
To write 604 in scientific notation, move the decimal point to the right until there is only one non-zero digit to the left of the decimal. So, 604 becomes 6.04. Then, count the number of places the decimal point moved. In this case, it moved two places. Finally, express it as 6.04 × 10² or 6.04e2 in scientific notation.
It is: 6.04*10^2
Antares -- 604 light-years distant, magnitude 1.05, an "M" class star, cooler than our Sun.
It is difficult to see why you would do a multiplication using subtraction but one possible answer is: 8 * 604 = (10-1-1)*604 = 10*604 - 1*604 - 1*604 = 6040 - 604 - 604 = 4832
604
It is: 604/2 = 302
604
The positive integer factors of 604 are: 1, 2, 4, 151, 302, 604
778
55 x 604 = 33,220