Volume of sphere is
V=4/3pi r^3
Where r is 2 in this example so,
V= 10.67 pi
V= 33.51
To find the area of the circle with diameter = 18 cm
We will use the formula:

where r= radius of the circle
From the quesion diameter = 18 cm
radius = diameter/2
radius = 18cm/2 = 9 cm
substituting r = 9cm into the formula


The above answer is when we are to leave the answer in terms of π
Otherwise if π is given to be 3.14 or 22/7 , we will simply substitute into the formula
That is given that π= 3.14
Answer:
<1 and <2 are remote interior angles of <6
<2 and <3 are remote interior angles of <4
(13x² + 5x) + 8x²
= (13 + 8)x² + 5x
= 21x² + 5x