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Bond [772]
3 years ago
6

Twenty years later -- in 1974 -- how many cases of polio were diagnosed in the United States?

History
2 answers:
Schach [20]3 years ago
6 0
There were 150 polio cases
Darina [25.2K]3 years ago
4 0
5 cases, hope this helps :)
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Answer:

10.

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12.

a. The equation is y = 19 x

b. The height of 13 DVD cases is 247 mm

Explanation:

<u>12.</u>

- A proportional relationship is about two quantities vary directly with

each other

- Ex: If y proportion to x, then y is varies directly with x  That means y ∝ x ⇒ y = k x, where k is the constant of variation

- The height of a stack of DVD case is proportional to the number of  case in the stack

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a.  ∵ The number of cases = x

∵ The height of the cases = y

∴ y ∝ x

∴ y = k x

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∵ y = 114 mm when x = 6

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∵ 114 = 6 k

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- Substitute the value of k in the equation above

∴ y = 19 x

* The equation is y = 19 x

b.

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∵ y = 19 x

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∴ y = 19 × 13

∴ y = 247 mm

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Prior to Germany's conquest of Denmark and Norway they had no access to the Atlantic Ocean so C is the correct answer
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Serves as a watchdog what dose this mean​
prisoha [69]

Answer:

they watch and warn others when someone/thing is coming

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