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3 years ago

Please answer asap.will mark you as brainliest

Mathematics

1 answer:

shtirl [24]3 years ago

8 0

Answer:

= and $\leq$ and $\geq$

Step-by-step explanation:

Absolute value -9 is 9, but there is a negative sign so it is -9

-9=-9

Greater than or equal to works because of the equal sign.

Less than or equal to also works because of the equal sign.

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Classify the scenarios based on whether they are observational studies, experiments, or surveys. Scenario A: Twenty employees of

viktelen [127]

Answer:

Just took test, got it right. In the following:

Step-by-step explanation:

Scenarios:

A- Survey

B- Observation

C- Experiment

D- Survey

6 0

2 years ago

Valerie and Robbie are playing a number game.

Sergio039 [100]

Answer:

Step-by-step explanation:

6 0

3 years ago

If a 100.8 kg cement bag had 20.35 kg removed from it, what is the new weight of the bag?

Snowcat [4.5K]

Just subtract 20.35 from 100.8
$100.8 \: kg - 20.35 \: kg = 80.45 \: kg$

if your bag weighs 100.8 kg and you scoop out 20.35 kg then weigh your bag it will be 80.45 bc u took out 20.35 kg of the cement to use. hope that explains it

8 0

3 years ago

A random sample of 18 graduates of a certain secretarial school typed an average of 80.6 words per minute with a standard deviat

insens350 [35]

Answer: ( 77.27 , 83.93)

Therefore at 95% confidence/prediction interval is

= ( 77.27 , 83.93)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 80.6 words per minute

Standard deviation r = 7.2

Number of samples n = 18

Confidence interval = 95%

z(at 95% confidence) = 1.96

Substituting the values we have;

80.6+/-1.96(7.2/√18)

80.6+/-1.96(1.697056274847)

80.6 +/- 3.33

= ( 77.27 , 83.93)

Therefore at 95% confidence/prediction interval is

= ( 77.27 , 83.93)

7 0

3 years ago

Jason's meeting starts at 3 p.m. and is 270 miles away. He estimates that he can average 60 miles per hour. What time should he

Maurinko [17]

Answer:

He should leave by 10:30 a.m

Step-by-step explanation:

If he drives 60 miles per hr it will take him 270÷60=4.5 (4 n half) hrs to reach there.

If he want to be there at 3p.m he should leave by 10:30 a.m

4 0

3 years ago