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3 years ago

Which pair of variables has a clear causal link between the two named variables?

Mathematics

2 answers:

levacccp [35]3 years ago

8 0

D. The numbers of notebooks sold and the number of pens sold in a stationery store

sertanlavr [38]3 years ago

7 0

Answer:

D. the number of air conditioners sold per day in a city and the daily temperature

Step-by-step explanation:

Let analyse all the possible answers:

A. the number of hats sold and the number of mittens sold in a city

They show no relationship towards each other, both of them are independent variables. If you buy hats, you can buy mittens or not it is ok.

B. the amount of butter and the amount of bread consumed by a family

They show no relationship towards each other, both of them are independent variables. If you buy bread, you can eat it with jams, without butter is fine.

C. the number of notebooks sold and the number of pens sold in a stationery store

They show no relationship towards each other, both of them are independent variables. I can use pencil to write on that notebooks, do not need to buy pens.

D. the number of air conditioners sold per day in a city and the daily temperature

They show a strong relationship towards each other, the daily temperature is the independent variable and it makes people want to buy air conditioners (dependent variable)

E. the number of hours a person can swim and the depth of the pool

They show no relationship towards each other, both of them are independent variables. The number of hours a person can swim depends on their ability.

So we choose D.

You might be interested in

-3(-5)-3y=-6 find the value of y

julia-pushkina [17]

-3 (-5) - 3y = -6

15 - 3y = -6

-3y = -6 + (-15)

-3y = -21

y = -21 / -3

y = 7

The value of y is 7.

6 0

4 years ago

At breakfast, he drinks 237 milliliters. At lunch, he drinks 300 milliliters.

Lostsunrise [7]

Answer:

$Total\ amount\ of\ water\approx720\ ml$ (Estimation)
$Actual\ amount\ of\ water=714\ ml$

Step-by-step explanation:

<h3> The complete exercise is:</h3><h3> "At breakfast, he drinks 237 milliliters. At lunch, he drinks 300 milliliters. At dinner, he drinks 177 milliliters. Estimate the total amount of water Rogelio drinks. Then, find the actual amount of water he drinks at all three meals."</h3>

In order to estimate the total amount of water Rogelio drinks at all three meals, you need to follow these steps:

1. Round 237 milliliters and 177 milliliters to the nearest Tens place.

If the digit in the Ones place is less than 5, you must round down.

If the digit in the Ones place is greater than or equal to 5, you must round up.

Then:

$237\ ml\approx240\ ml\\\\177\ ml\approx180\ ml$

2. Add 240 milliliters, 300 milliliters and 180 milliliters:

$Total\ amount\ of\ water\approx240\ ml+300\ ml+180\ ml\approx720\ ml$

In order to find the actual amount of water Rogelio drinks at all three meals, just add 237 milliliters, 300 milliliters and 177 milliliters. This is:

$Actual\ amount\ of\ water=237\ ml+300\ ml+177\ ml=714\ ml$