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3 years ago

15

How long does it take the ball to hit the ground when dropped from 50ft.?

1 answer:

bixtya [17]3 years ago

4 0

I hope it's about 1.8 sec

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An outbreak of the deadly Ebola virus in 2002 and 2003 killed 91 of the 95 gorillas in 7 home ranges in the Congo. To study the

dimaraw [331]

Answer:

Correlation between x and y is 0.9508

Step-by-step explanation:

We are given the following in the question:

Distance(x): 1 4 6 6 6 7

Days(y): 2 20 29 38 44 50

We have to find the correlation between x and y.

$\sum y = 183\\\sum x=30\\\bar{x} = \displaystyle\frac{\sum x}{n} = \frac{30}{6} = 5\\\\\bar{y} = \displaystyle\frac{\sum y}{n} = \frac{183}{6} = 30.5\\\\(x-\bar{x}) = -4,-1,+1,+1,+1,+2\\(y-\bar{y}) = -28.5,-10.5,-1.5,7.5,13.5,19.5\\\sum (x-\bar{x}) (y-\bar{y}) = 183\\\sum(x-\bar{x})^2 = 24\\\sum(y-\bar{y})^2= 1543.5\\$

Formula:

$r = \dfrac{\sum(x-\bar{x})(y - \bar{y})}{\sqrt{\sum(x-\bar{x})^2\sum(y-\bar{y})^2}}$

Putting values, we get,

$r = \dfrac{183}{\sqrt{24\times 1543.5}} = 0.9508$

Thus, correlation between x and y is 0.9508

5 0

3 years ago

Ten people were surveyed. The scatterplot shows the relationship between the number of fruit servings and the number of vegetabl

Oksana_A [137]

Answer:b

Step-by-step explanation:

It b

5 0

3 years ago

A. 4 feet by 1 1/2 feet

Triss [41]

The answer would be C because 2*2 =4 and 7/8*2 =1.75 put that into fraction form. 1 3/4

5 0

3 years ago

Solve for X<br><br> Log x - log 3 = log(x-2)<br><br> Please please help

andre [41]

Step-by-step explanation:

$log \frac{a}{b} = loga - logb$

logx - log3 = log(x-2)

$log( \frac{x}{3} ) = log(x - 2)$

$\frac{x}{3} = x - 2$

x = 3(x - 2)

x = .......

8 0

3 years ago

Explain how to wrie a function rule from the table then write one

ipn [44]

Answer:

See example below.

Step-by-step explanation:

If the function has the table:

x f(x)

-3 -6

-2 -4

-1 -2

0 0

Step 1 : Looking at the table, find a pattern. This table f(x) deceases by 2 each time. This is a constant rate of change called slope.

Step 2: Recognize the pattern. Since it is decreasing by 2 each time, this is a linear function. Its equation can be written using y = mx+b.

Step 3: Use the form, y =mx + b and substitute m and b.

Step 4: The slope is m . The slope is -2. m = -2.

Step 5: Find the y-intercept. b is the y-intercept or starting point where x = 0. When x=0, the table shows y=0. So b=0.

This means the rule is y = -2x.

6 0

4 years ago