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3 years ago

What is the correlation coefficient for the data shown in the

Mathematics

2 answers:

zaharov [31]3 years ago

8 0

Answer:

The number of times a player has golfed in one’s lifetime is compared to the number of strokes it takes the player to complete 18 holes. The correlation coefficient relating the two variables is –0.26.

Which best describes the strength of the correlation, and what is true about the causation between the variables?

It is a weak negative correlation, and it is not likely causal.

It is a weak negative correlation, and it is likely causal.

It is a strong negative correlation, and it is not likely causal.

It is a strong negative correlation, and it is likely causal.

Step-by-step explanation:

Crank3 years ago

4 0

Answer: r= -1

Step-by-step explanation:

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Two hikers, Charles and Maria, begin at the same location and travel in perpendicular directions. Charles travels due north at a

attashe74 [19]

Answer:

d(L)/dt = 9,43 miles per hour

Step-by-step explanation:

As Charles and Maria travel in perpendicular directions, these directions could be considered as two legs ( x and y ) of a right triangle and distance (L) between them as the hypotenuse, therefore, according to Pythagoras theorem

L² = x² + y²

And as all ( L , x , and y ) are function of time, we apply differentiation in both sides of the equation to get

2* L d(L)/dt = 2*x*d(x)/dt + 2*y*d(y)/dt (1)

In equation (1) we know:

d(x)/dt = 8 miles/per hour ( Maria )

d(y)/dt = 5 miles /per hour (Charles)

In 3 hours time Maria has travel 3*8 = 24 miles

And Charles 5*3 = 15 miles

Then at that time L is equal to

L = √ 24² + 15² ⇒ L = √ 576 + 225 ⇒ L = √801 ⇒ L =28,30 miles

Then plugging these values in equation (1)

2* L d(L)/dt = 2*x*d(x)/dt + 2*y*d(y)/dt

2* 28.30 * d(L)/dt = 2*24*8 + 2* 15*5

56.6 *d(L)/dt = 384 + 150

d(L)/dt = 534/56,6

d(L)/dt = 9,43 miles per hour

4 0

3 years ago

Write en equation if y=75 when x=500.Find your answer in the answer column and notice the two letters next to it.

Mila [183]

The answer would be about y = 6.67x

4 0

3 years ago

The angle elevation from point B to the top of a hill is 59°. If point B is 450 feet from the base of the hill, how high is the

makvit [3.9K]

Answer:

749 ft

Step-by-step explanation:

It's a right-angle triangle so you can use trig ratios

750 feet

tan(59) = opposite/adjacent

tan(59l = X/450

X = 450×tan(59)

X = 748.9 ft

X = 749 ft (correct to 3 sf)

3 0

3 years ago

sweaters already on sale for 20% off the regular price cost $28 when purchased with a promotion coupon that allows an additional

r-ruslan [8.4K]

The original price was $50.

To find this we need to start with the price you paid ($28). We then use this cost to find the pre-coupon price. Since the coupon affords a 20% discount, that means you pay for 80%. To solve this, simply divide the price you paid by the percentage you paid.

$28/.80 = $35.

Now that we have the pre-coupon price ($35), we can use that to find the original price. Again, we'd want to divide that by the percentage you paid for, which is 70%.

$35/.70 = $50

3 0

2 years ago

The ceiling of Katie’s living room is a square that is 15 ft long on each side. To decorate for a party, she plans to hang crepe

egoroff_w [7]

Answer:

6 rolls because the total perimeter is 102 ft and five rolls is only 100 feet. So she needs 6 rolls.

Step-by-step explanation:

to find perimeter, add up all the side lengths.

so 15*4 (it's easier than 15+15+15...)

60 ft.

now we have to use Pythagorean's Theorum to find corner to corner.

so $a^2+b^2=c^2$

we have a and b

$15^2+15^2=c^2$

do the math...

225+225= 450

square root of 450=

21.213

double that because it's used twice (corner to corner and corner to corner)

42.426

now add it all up

42.426 + 60 = 102.426

we can round

102

20*5 = 100

so she needs 6

MY ORIGINAL ERROR WAS 5, BUT 5 TIMES 20 IS ONLY 80, SO THEREFORE 6 IS REQUIRED SO THERE IS ENOUGH TO COVER 102.

6 0

3 years ago