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3 years ago

SOMEONE HELP ME ON THIS!!

Mathematics

1 answer:

svlad2 [7]3 years ago

7 0

Answer:

a) 8 ,18 year old students took part in the survey

b) 10

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suppose the depth of the tide in a certain harbor can be modeled by y = 20 + 5 cos (pi/6 t), where y is the water depth in feet

Rom4ik [11]

Answer:

- high tide occurs at 12 noon and 12 midnight

- Low tide occurs at 6 a.m and 6 p.m

- maximum depth value = 20 ft

- Minimum depth value = 15 ft

Step-by-step explanation:

The depth is modelled as;

y = 20 + 5 cos (πt/6)

We are told that t = 0 represents 12:00 midnight.

This is high tide because at t = 0, the cos function will be at it's maximum value of 1 since cos 0 = 1.

Max depth value is;

y = 20 + 5(0)

y = 20 ft

Minimum depth value will be the low tide and it will be when the cos function is equal to -1.

Thus;

y = 20 + 5(-1)

y = 15 ft

Since t represents number of hours and since at 12 midnight, t = 0, thus; high tide will occur again at;

12 noon

Also, let's check for low tide.

Let's try t = 6 which means 6 a.m

Thus;

y = 20 + 5 cos (π(6)/6)

y = 20 + 5 cos π

Cos π has a value of -1

Thus;

y = 20 + 5(-1)

y = 20 - 5

y = 15 ft

Thus;

Low tide occurs at 6 a.m and 6 p.m

5 0

3 years ago

Express the indicated degree of likelihood as a probability value. "Your mother passed away two years before you were born." 0.5

Zolol [24]

The probability degree is 0 as I wouldn't be born if my mother passed away long before she conceived

4 0

4 years ago

Read 2 more answers

Plz help asapppp so i can get it right

defon

The second one or the third one hope that help a little bit

7 0

3 years ago

Please Help me Due today

Helen [10]

Answer:

Strong positive correlation

Step-by-step explanation:

The given scatterplot, where the data points are sloping upward:

The stronger the association of the two variables, the closer the Pearson correlation coefficient, r, will be to either +1 or -1 depending on whether the relationship is positive or negative, respectively.

If the value of the correlation coefficient is 0 < r < 1 then there is a positive linear trend and the data points are scattered around the line of best fit; the smaller the absolute value of r, the less well the data can be visualized by a single linear relationship. The closer the value of r to 0 the greater the variation around the line of best fit.

In the attached screenshot, where I've drawn a line across the graph: it shows that the data points are clustered around the line. It is easier to estimate that the value of r is closer to 1, which implies a strong positive relationship between two variables. My estimate is that r = 0.8.

Therefore, the correct answer is Strong Positive association.

Please mark my answers as the Brainliest, if you find this helpful :)

3 0

3 years ago

A rubber ball is bounced from a height of 9 meters and bounces continuously .Each successive bounce reaches a height that is a t

klio [65]

Answer: 54

Step-by-step explanation: If the ball bounces 3 times at first that would be 9 x 3 which equals 27. But if you bounce it 6 times, that would be 9 x 6 which equals 54. :)

8 0

3 years ago