Step-by-step explanation:
13? i forgot all this math XD
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Volume of cylinder = πr²h
Volume = 3.14 x 4² x 20
Volume = 1,004.8 m³
When the tank is 60% full, the volume is:
0.6 x 1004.8
= 602.88 m³ of water
(f+g)(-1)
=f(-1)+g(-1), so;
f(x)=3x+8
f(-1)=3(-1)+8
f(-1)=-3+8
f(-1)=5
g(x)=6x+6
g(-1)=6(-1)+6
g(-1)=-6+6
g(-1)=0
Finally:
f(-1)+g(-1)
=5+0
=5. As a result, (f+g)(-1) is 5. Hope it help!