Answer: 10
Step-by-step explanation:
Answer:
To find the radius, divide the diameter by 2;
V={π(r^2)h}/3
={3.14(4^2)*9 cm^3}/3
=3.14*16*3 cm^3
=150.72 cm^3
Answer:
7.9 is less than 8.0
Step-by-step explanation:
Source My head
Recall that for all t,
cos²(t) + sin²(t) = 1
Now,
x = 5 cos(t) - 7 ⇒ (x + 7)/5 = cos(t)
y = 5 sin(t) + 9 ⇒ (y - 9)/5 = sin(t)
so that substituting into the identity above, we get
((x + 7)/5)² + ((y - 9)/5)² = 1
which we can rewrite as
(x + 7)²/25 + (y - 9)²/25 = 1
(x + 7)² + (y - 9)² = 25
and this is the equation of a circle centered at (-7, 9) with radius 5.
