Answer:
78 meters
Step-by-step explanation:
the big one is 9 x 10 =90 meters
The smaller one is 3 x 4 =12 meters
the remaining area is 90-12=78 meters
Rational numbers are any numbers that terminate (the decimal ends somewhere)
The only set that does this is D, since

All other sets have these:

None of these terminate (the decimals goes on forever), so the answer is D
Answer:
X=36
Step-by-step explanation:
Let x be the unknown number
Three quarters of a number =3x/4
Three was added =3x/4 +3
Final
3x/4 + 3= 30
Multiply through with 4
3x+ 12=120
3x=120-12
3x=108
X=108/3
X=36
Answer:
2850
Step-by-step explanation:
You pay 3% on the first 10,000, 5% on the next 40,000, and 5.5% on the last 10,000.
10,000x.03=300
40,000x0.05=2000
10,000x.055=550
2000+550+300=2,850