Answer:
291.2
Step-by-step explanation:
28000
2.8 * 10^4
in standard form means
2.8 * ( 10 * 10 * 10 * 10 )
this is because 10 ^4 is interpreted as ( 10 * 10 * 10 * 10 )
hence 2.8 * 10^4
= 28000
