Answer:
Correct answer: V = 486 π ft³
Step-by-step explanation:
Given:
Diameter of the sphere d = 18 ft
d = 2 · r where r is radius
r = d / 2 = 18 / 2 = 9 ft
r = 9 ft
V = (2/3) · r³· π
V = (2/3) · 9³ · π = (2/3) · 729 · π = 486 π ft³
V = 486 π ft³
God is with you!!!
Answer:
Her mother
Step-by-step explanation:
1.8 KM is less then 2.1 KM
Answer:
C
Step-by-step explanation:
its a wild guess because you didn't add a picture or anything to show the pyramid
This can be solved in several ways. First with the basic trigonometry identity of tangent and sine (or cosine)
tanα=opposite side/adjacent side...
tanα=20/3
α=arctan(20/3)
Then sinα=h/x
x=h/sinα where α found above and h=20m:
x=20/sin(arctan(20/3)) meters
x≈20.22m (to nearest one-hundredth of a meter)
...
We could also use the Pythagorean Theorem which is easier for this problem...
x^2=h^2+d^2
x^2=20^2+3^2
x^2=400+9
x=√409 meters
x≈20.22 meters...
...
We could also use the Law of Cosines:
x^2=a^2+b^2-2abcos90 (-2abcos90=0 so we essentially get what we just did above)
x^2=a^2+b^2
x^2=409
x=√409
x≈20.22 meters