A juice can is 16 cm tall and has a diameter of 9 cm. The ends of the can are tin and the body is cardboard.
1 answer:
Answer:
I'll setup the problem and you can do the calculations
Step-by-step explanation:
a.
V = volume; D = diameter; H = height of can
b.
Area of the Tin is the total area of the 2 Tin circles
one circle's area A is
A = area; D = diameter
calculate A
Then multiply by 2
c.
The area of the cardboard is the circumstance of the circle
times the height
d.
add answers from b and c
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Answer:
So starting off with 1a f(4)
We simply substitute x with 4 for the function
f(4)=2(4)-5
f(4)=8-5
f(4)=3
Next 1b, here it's a little different since you have to multiply the functions I think ( please correct me if I'm wrong).
gf(4), basically means functions g and f are being multiplied and their variables are being substituted with 4.
g(4)=4^2+3
g(4)=16+3
g(4)=19
and we also know from before that f(4)=3, so we'll do 19 times 3 which is 57
For the next two, I may be wrong, but I'm still going to try:
anything to the power of a negative is a fraction so for f^-1(x)=2x-5 we'll have 1/f(x)=x/2+5/2
And then for g^-1, we'll have 1/g(x)=
Hope I helped :)