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mel-nik [20]
3 years ago
13

In a certain? chemical, the ratio of zinc to copper is 4 to 17. A jar of the chemical contains 612 grams of copper. How many gra

ms of zinc does it? contain?
Mathematics
1 answer:
snow_tiger [21]3 years ago
3 0

Answer:

The answer is 144 grams of zinc

Step-by-step explanation:

proportion zinc to copper = 4/17

4/17 = z/ 612

multiply the extremes

17 . z = 4 . 612

17 . z  = 2,448

z  = 2,448 / 17

z = 144

The answer is 144 grams of zinc

Always check your answer

4/ 17 = 144/612 = 0.235

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A random sample of 300 balls hit into play in college baseball games is taken. For each ball hit into play, it is recorded wheth
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Answer:

Null hypothesis: There is no relationship between direction of the ball and if it resulted in a hit or an out.

Step-by-step explanation:

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A random sample of 300 balls hit into play in college baseball games is taken. For each ball hit into play, it is recorded whether the ball was hit to the left, center, or right of the field, and whether the ball resulted in a hit or an out.

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The hypothesis for the regression analysis is defined as follows:

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5 0
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Answer:

30,60,90

Step-by-step explanation:

A triangle’s interior angles sum to 180.

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3 0
3 years ago
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