Answer:
Ali's solution is incorrect. Ali had to add both the terms and should get 10y answer, and not multiply both terms and get answer 9y^2 which is wrong. Step-by-step explanation: Ali simplifies the expression 9y+y to 9y2.
Step-by-step explanation:
Answer:
about 1/4
Step-by-step explanation:
that is simplifies, its a little over 1/4 but it says about so, yeah
1. X = {-7, -3, 2, 1, 5, 8} and Y = {-8, -3, -1, 2, 5, 8, 9}; what is the sum of the elements of X ∩ Y?
marysya [2.9K]
Answer:
X intersection Y= {-3,2,5,8}
319 days to feb 10 months and 16days
We find the volume of the path in cubic meters and multiply by 106 bags per cubic meter.
The path is an annulus with inner radius r=7 m and outer radius s=7+2=9 m and depth in meters d=50/1000 = 0.05 m.
The volume is the area of the path times its depth; the area is the difference of the area of the outer and inner circles of the annulus.
![V = d(\pi s^2 - \pi r^2) = 0.05 \pi(9^2-7^2) \approx 5.02655 \textrm{ m}^3](https://tex.z-dn.net/?f=V%20%3D%20d%28%5Cpi%20s%5E2%20-%20%5Cpi%20r%5E2%29%20%3D%200.05%20%5Cpi%289%5E2-7%5E2%29%20%5Capprox%205.02655%20%5Ctextrm%7B%20m%7D%5E3)
We need
![n \approx 106 \times 5.02655 \approx 532.8](https://tex.z-dn.net/?f=n%20%5Capprox%20106%20%5Ctimes%205.02655%20%5Capprox%20532.8)
Answer: 533