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Andre45 [30]
3 years ago
7

A scientist estimates that the mean nitrogen dioxide level in a city is greater than 30 parts per billion. To test this estimate

, you determine the nitrogen dioxide levels for 31 randomly selected days. The results (in parts per billion) are listed below.
Mathematics
1 answer:
irina [24]3 years ago
3 0

Answer:

Step-by-step explanation:

incomplete. no results listed below

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HELP!!!!! This is due to DAy]
kompoz [17]

Answer:

D. 9

Step-by-step explanation:

9 is odd, however it is a composite number. That is the opposite of what the conditional is saying.

8 0
3 years ago
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20pts please help me
vfiekz [6]
The answer is B. 245.04/3.14 = 78pi

Hope this helps
6 0
3 years ago
Round 198 to the nearest ten and hundred
zzz [600]
Nearest 100: 200
nearest 10: 200

4 0
3 years ago
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From a point at the waters edge, a bridge arch 53 m away has an angle of elevation of 30, and the top of a yacht mast 14 m away
Arte-miy333 [17]

Answer:

Yes

Step-by-step explanation:

We don't  even have to do a calculation.  

The arch of the bridge is at point C.

The top of the yacht's mast is at E.

Even though the yacht is much closer to the water's edge, its mast has a much smaller angle of elevation.

The yacht can easily pass under the bridge.

3 0
3 years ago
1. A game is set up as follows: All the diamonds are removed from a deck of cards, and these 13 cards are placed in a bag. The c
Maurinko [17]

Answer:

the game must be played in groups of 13 draws, with a cost of $28 for the 13 draws.

Step-by-step explanation:

Probability of drawing any of the 13 balls is the same. So the expected value of play is the average of the values of each card.

The only losing card is the ace; the player loses $20 if that card is drawn.

Each of the 3 face cards wins $10; each of the remaining 9 cards wins $2.

So the average value of each draw is

\frac{-20+3\times10+9\times2}{13}

= 28/13

Therefore, on average the player will win $ 28/13.  to be a fair game the player must pay  $28/13 for a game.

that is not possible, unless the game must be played in groups of 13 draws, with a cost of $28 for the 13 draws.

7 0
3 years ago
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