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Andru [333]
3 years ago
8

Which ratios form a proportion?

Mathematics
2 answers:
nika2105 [10]3 years ago
7 0
The answer would be d. hope that helped
ElenaW [278]3 years ago
5 0
Your answer would be D.

This is because you could multiply 5/8 by 2 to get 10/16.
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A closed cylindrical can of fixed volume V has radius r.a) Find the surface area, S, as a function of r.b) What happens to the v
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Answer:

Step-by-step explanation:

This question is incomplete; here is the complete question.

A closed cylindrical can of fixed volume V has radius r. (a) Find the surface area, S, as a function of r. (b) What happens to the value of S approaches to infinity? (c) Sketch a graph of S against r, if  V=10 cm³.

A closed cylindrical can of volume V is having radius r and height h.

a). Surface area of a cylinder is given by

S = 2(Area of the circular sides) + Lateral area of the can

S = 2πr² + 2πrh

S = 2πr(r + h)

b). Since surface area is directly proportional to radius of the can

S ∝ r

Therefore, when r approaches to infinity (r → ∞)

c). If V = 10 cm³ Then we have to graph S against r.

From the formula V = πr²h

10 = πr²h

h = \frac{10}{\pi r^{2}}

By placing the value of h in the formula of surface area,

S = 2\pi r(r+\frac{10}{\pi r^{2}})

Now we can get the points to plot the graph,

r       -2             -1         0       1            2

S    -13.72     -13.72     0    26.28    35.13

7 0
3 years ago
What’s he answer thanks
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24 miles = 326 gallons

divide each side by 24: 1 mile = 13.583 gallons

round: 13.6 miles per gallon

7 0
3 years ago
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Answer:

what is difficult about this problem?   do you not have a calculator?  what part is tough?

Step-by-step explanation:

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Gillian earns $7.50 an hour babysitting on the weekends.Last week she babysat for 2.2 hours on Saturday and 3.5 hours on Sunday.
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Total hours= 2.2+3.5=5.7

Total earned = 5.7 x $7.50= $42.75

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4 years ago
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