A buoy used to mark the swimming area at a local beach is in the shape of a sphere that has a diameter of 1.8 meters. About what is the volume of air in the buoy?

The volume of air in buoy is 3.05 cubic meters.

Step-by-step explanation:

We are given the following in the question:

Diameter =  1.8 meters

Radius, r =

The radius of buoy is 0.9 meters.

Volume of air in buoy:

Volume of sphere =

Thus, the volume of air in buoy is 3.05 cubic meters.

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.

answer: i think it is (1,-2)