Answer:
420 miles
Step-by-step explanation:
Opposite Numbers and their Sums:
1+6=7
2+7=9
3+8=11
4+9=13
5+10=15
Because of this, the pair of opposite numbers are 3 and 8 if you want the pair that equal 11.
Answer:
490
Step-by-step explanation:
19.6
25
980
3920
4900
then add the decimal
490.0
Moving the decimal point one place is a factor of ten; two places is a factor of 100
So 100.
NB; three places would be 1000