Answer:
c. y= cos2/3x
Step-by-step explanation:
Answer:
The estimate value of the world's radius is 6384 kilometers ⇒ A
Step-by-step explanation:
The formula of the circumference of a circle is C = 2πr, where r is the radius of the circle
∵ The circumference of the world is 24,901 miles
∵ C = 2πr
- Substitute C by 24,901 to find r
∴ 24,901 = 2πr
- Divide both sides by 2π
∴
= r
∴ The radius is 3965.127389 miles
Change the mile to kilometer
∵ 1 mile = 1.60934 kilometers
- Multiply the value of the radius by 1.60934
∴ r = 3965.127389 × 1.60934
∴ r = 6381.238111 kilometers
- Round it to the nearest kilometers
∴ r = 6381 kilometers
The world's radius is 6381 kilometers
The nearest choice for this value is A
The estimate value of the world's radius is 6384 kilometers
It’ll be the one on the far right last one ;)
Answer:
461.875 cubic cm
Step-by-step explanation:
Volume of wood in the block
= volume of cuboid - 3 times the volume of one hemisphere
![=lbh - 3\times \frac{2}{3} \pi r^3\\= 20\times 7\times 4 - 2\times 3.14\times (2.5)^3\\= 560 - 6.28\times 15.625\\= 560 - 98.125\\= 461.875 \: cm^3](https://tex.z-dn.net/?f=%3Dlbh%20-%203%5Ctimes%20%5Cfrac%7B2%7D%7B3%7D%20%5Cpi%20r%5E3%5C%5C%3D%2020%5Ctimes%207%5Ctimes%204%20-%202%5Ctimes%203.14%5Ctimes%20%282.5%29%5E3%5C%5C%3D%20560%20-%206.28%5Ctimes%2015.625%5C%5C%3D%20560%20-%2098.125%5C%5C%3D%20461.875%20%5C%3A%20cm%5E3)
Answer:
w = -10,6
Step-by-step explanation:
w(4+w)=60
4w + w^2 -60 = 0
w^2 +4w -60 = 0
w^2 +10w -6w -60 = 0
w(w+10) -6(w+10) = 0
w = -10, 6