A living room is 1,400 cubic meters. If there are 3.6 x 10' particles of dust per cubic meter, how many particles of dust are there in the living room?
A) 5.04 x 102 particles
B) 5.46 x 1012 particles
C) 6.04 x 1013 particles
D) 6.44 x 1013 particles

5.04x particles

in your situation is choose : A

Step-by-step explanation:

the volume of the living room is 1,400, and there are 3.6 x particles of dust /

we will convert the room volume to scientific notation = 1.4 x

then, the total number of particles will be the product of the two numbers, which is 1.4 x times 3.6 x particles/= 5.04x particles

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

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