Answer:
The volume of sphere is
.
Step-by-step explanation:
We have,
Radius of a sphere is 18 units.
It is required to find the volume of sphere.
The formula of the volume of sphere in terms of radius is given by :

Plugging all values in above formula

So, the volume of sphere is
.
Answer:
B
Step-by-step explanation:
The equation is Y = mx + b so just plug in the m and the b
Answer: 
Step-by-step explanation:
Given : Sample size :
, which is a small sample (, 30) so we use t-test.
Sample mean : 
Standard deviation : 
Significance level : 
Critical value : 
The confidence interval for population mean is given by :-

Hence, a 95% confidence interval for the population mean
= 
ANSWER
Focus:

Directrix:

EXPLANATION
The given parabola has equation:

We compare this to the general equation,

Comparing the coefficient of x, we have:
-4p=-1

The focus is (-p,0)

The equation of the directrix is
x=p

Answer:
5x - 18
Step-by-step explanation:
-3(x + 6) + 8x
Multiply
(-3 * x) + (-3 * 6) + 8x
-3x + (-18) + 8x
5x - 18
Hope this helps :)