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kodGreya [7K]
3 years ago
13

And here's the third one.

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
8 0
Yes her number line make sense in why is because the way she sat it up was the right way..
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Researchers wanted to evaluate whether a certain herb improved memory in elderly adults as measured by objective tests. To do? t
astra-53 [7]

Answer: The placebo group serves as the control group because this group corresponds to the reference point that will be compared to the other group.

Step-by-step explanation:

The control group is a reference point in an experiment they usually never receive any treatment and serves as benchmark to compare other test result which are measured. The control groups also includes individual with similar characteristics like those been tested e.g Age, health history.

Members in a control group are usually given placebos and usually do not know that they are part of the control group. This helps the researcher determine the effectiveness of the study being carried out.

7 0
3 years ago
What is the approximate area of the garden?
serg [7]

Answer:

Option D

Step-by-step explanation:

By applying Pythagoras theorem in triangle ABC,

(Hypotenuse)²= (Leg 1)² + (Leg 2)²

AC² = AB² + BC²

AC² = (40 - 15)² + (80 - 75)²

AC² = (25)² + 5²

AC² = 650

AC = √650

AC = 25.495 ft

Since, area of a rectangle = Length × Width

Therefore, area of the garden = 25.495 × 6

                                                  = 152.97

                                                  ≈ 153 ft²

Since, 150 is very close to 153, approximate area of the rectangular garden is 150 ft².

Option D is the answer.

7 0
3 years ago
Lamont measured a city park and made a scale drawing. In real life, the soccer field is 70 meters wide. It is 175 millimeters wi
Alekssandra [29.7K]

Answer: Your complete answer is - 105

Step-by-step explanation: subtract 70 from 175 and your answer is 105

6 0
3 years ago
The UK has an area of 243,610km2 and a population of 6.41 x 107. Calculate the population density the United Kingdom. Answer to
hodyreva [135]

Answer: Population density the United Kingdom =2.63\times10^2

A= 2.63

B= 2

Step-by-step explanation:

We know that, to calculate the population density, we will divide the population by the size of the area.

i.e. \text{Population density}=\dfrac{\text{Population size}}{\text{Area}}

Given : Area of UK = 243,610 km²1

Population = 6.41 \times 10^7

Then, the population density the United Kingdom would be :

\text{Population density}=\dfrac{6.41 \times 10^7}{243,610}\\\\=\dfrac{64100000}{243610}=263.125487459\\\\\approx263=2.63\times10^2

On comparing to A\times10^B, we get

A= 2.63

B= 2

3 0
3 years ago
Paul has thirteen coins in his piggy bank. Some of the coins are quarters, some are nickels, and he has a total of $3.55. Which
IceJOKER [234]

Answer:

The answer is B

Step-by-step explanation:

you know that x is quarters which is .25 and you know that y is nickels which is .05

there are a total of 13 coins in the bank so x+y = 13

you also know that the 13 coins = 3.55

so plug in all that you know and the problem is

0.25x + 0.05y = 3.55

3 0
2 years ago
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