Answer:B
Because when 0.0023 is written in scientific notation the answer is 2.3×10-³ which a negative sign
Step-by-step explanation:
5,600,000
5,600,000÷10
560,000
560,000÷10
56,000
56,000÷10
5,600
5600÷10
560
560÷10
56
56÷10
5.6
5.6×10⁶
23÷10
2.3
2.3×10¹
560÷10
56
56÷10
5.6
5.6×10²
0.0023
0.0023×10
0.023
0.023×10
0.23
0.23×10
2.3
2.3×10-³
5/7 = x/42
5/1 = x/6
X = 30
Answer:


Step-by-step explanation:
We have been given that at a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 11 m. The inner edge of the sidewalk is a circle with a radius of 9 m.
To find the area of the side walk we will subtract the area of inner edge of the side walk of lion pen from the area of the outer edge of the lion pen.
, where r represents radius of the circle.



Therefore, the exact area of the side walk is 
To find the approximate area of side walk let us substitute pi equals 3.14.


Therefore, the approximate area of the side walk is
.
He would have to sell $20,000 worth of clothes to get $2,000