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3 years ago

Which phrases describe the relationship between heart rate and daily intake of caffeine? Check all that apply.

Mathematics

2 answers:

Nana76 [90]3 years ago

5 0

Answer:

A positive correlation

Step-by-step explanation:

A positive correlation means that two entities are directly proportional to each other. If the value of one increases, the value of the second also increases. Similarly, if the value of one deceases, the other one also decreases.

There is a positive correlation between the two things - heart rate and daily intake of caffeine.

When caffeine intake is high then the heart rate is also high.

Thus a positive correlation can be seen here.

goblinko [34]3 years ago

4 0

- Increasing heart rate
- positive correlation

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a crowbar of 2cm is used to lift an object if 800N. if the effort arm is 260cm. calculate the effort applied.

Gelneren [198K]

Answer:

solution:Here

Given,

Load=800 N

Load distance=2cm

Effort distance=260cm

Effort applied=?

We know that,

Load × Load distance = Effort × Effort distance

or, 800×2 = e × 260

or,1600 = 260e

or,e = 1600/260

Thus, e = 6.15 N

Hence, The effort applied = 6.15 N

Hope this answer helped you..

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1 year ago

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PtichkaEL [24]

Answer:

A. Right angle -- if you multiply the slopes of 2 intersecting lines and you "-1" then the lines are perpendicular - in this case the line in quadrant 3 has a slope of "1" and the line in quadrant 4 has a slope of "-1", hence their product is "-1" and the angles formed at the intersection of the lines are right angles.

Step-by-step explanation:

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3 years ago

A line that includes the point (3, 2) has a slope of 0. What is its equation in slope-intercept

Yanka [14]

Answer:

y=0x+2

Step-by-step explanation:

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3 years ago

The ratio of green pepper plants to red pepper plants in Adelins garden is 3 to 5. If there are 20 red peppers plants, how many

Anon25 [30]

Answer:I think is 5.

Step-by-step explanation:

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4 years ago

Paul has 2/3 as many postcards as shawn . the number of postcards shawn has is 3/5 of the number of postcards tim has. if the th

kakasveta [241]

P = ( 2 / 3 )s;
s = ( 3 / 5 )t ;
p + s + t = 280 ;
Then, p =( 2 / 3 )( 3 / 5 )t ;
p = ( 2 / 5 )t;
We solve the equation : ( 2 / 5 )t + ( 3 / 5 )t + t = 280 ;
( 2 / 5 )t + ( 3 / 5 )t + ( 5 / 5 )t = ( 1400 / 5 )t;
10t = 1400 ;
t = 1400 ÷ 10 ;
t = 140 postcards has Tim;
p = ( 2 / 5 ) × 140 = 56 postcards has Paul;
s = ( 3 / 5 ) × 140 = 84 postcards has Shawn ;

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4 years ago