(5x10^4)+(3x10^3)+(8x10^2)+(0x10^1)+6x10^0)
Decimal is the dot used after the ones to show parts of one you normally see it in money. 1.50. The . between 1 and 50 is the decimal. Whats in front of the decimal is ones, tens, hundreds, etc and after the decimal is tenths, hundredths, etc.
Hope I helped<span />
Answer:
52.5
Step-by-step explanation:
7.50 x 7