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marshall27 [118]
2 years ago
8

A researcher conducted an experiment to study the effects of an herbal supplement on the duration of the common cold. From a sam

ple of 50 people who had a cold, the researcher assigned 25 people to take the supplement each day. The other 25 people were asked to drink water each day and were not given the supplement. The researcher recorded the number of days the cold lasted for each person. What are the experimental units of the study
Mathematics
1 answer:
OverLord2011 [107]2 years ago
3 0

Answer:

50 people

Step-by-step explanation:

-An experimental unit is any physical entity or person or animal that can be randomly assgned to a treatment.

-Such a unit is usually referred to as a unit of statistical analysis.

-Both control and actual experimental units are units of statistical analysis despite receiving different treatments.

-Hence, the experimental units of the study is 50 people.

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Write one problem using a dollar amount of $420 and a percent of 40%. Provide a solution to your problem. Please help I'm desper
luda_lava [24]
You could do :
Johnny was financing a limited editions Xbox One S. The price was $420 and he put down 40%. How much is left to be financed?
dp=420(40/100)=16800/100=168
then you would subtract 420-168 which would give you 252
;) good luck !!
3 0
2 years ago
What happens to the ones digit when you add on tens?
Nata [24]

Answer:

nothing

Step-by-step explanation:

The ones digit will not change.....only the 'tens' digit will change...

3 0
2 years ago
Order the set of integers from greatest to least.<br><br><br><br> {8, 32, 55, 32, 19, 3
dexar [7]

Answer:

55,32,32,19,8,3

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Plz help, And no links please
Talja [164]
I did not get any zeros since the graph doesn’t cross the x axis, meaning that there are no rational zeros

However, here is the method u can use to find the zeros lol


You can use the quadratic formula in order to get the zeros

This is the equation therefore use these values
ax^2+bx+c=0

A=1
B= -5
C=12

The quadratic formula is -b±√(b^2-4ac))/2a (I left a picture just in case)

6 0
2 years ago
A reflecting pool is shaped like a right triangle with one leg along the wall of a building. the hypotenuse is 9 feet longer tha
morpeh [17]

Answer:

Leg side along the wall = x ft = 8 ft

The other leg side = 7+x ft = 7+8=15 ft

The Hypotenuse =9+x ft = 9+8 = 17 ft

Step-by-step explanation:

In the question, the shape of the pool is right triangle.

Let the leg side along the wall to be the x ft

Let the other leg side  to be 7+x ft

Let the longest side/hypotenuse to be x+9 ft

Apply the Pythagorean relationship where the sum of squares of the legs equals the square of the hypotenuse

This means;

x^2 +(x+7)^2=(x+9)^2\\\\

Expand the terms in brackets

x^2+(x+7)^2=(x+9)^2\\\\\\x^2+x^2+14x+49=x^2+18x+81

collect like terms

x^2+x^2-x^2=18x-14x+81-49\\\\\\x^2=4x+32\\\\\\x^2-4x-32=0

solve for x in the quadratic equation by factorization

x^2-4x-32=0\\\\\\x^2-8x+4x-32=0\\\\\\x(x-8)+4(x-8)=0\\\\\\(x+4)(x-8)=0\\\\\\x+4=0,x=-4\\\\x-8=0,x=8

Taking the positive value of x;

x=8ft

Finding the lengths

Leg side along the wall = x ft = 8 ft

The other leg side = 7+x ft = 7+8=15 ft

The Hypotenuse =9+x ft = 9+8 = 17 ft

6 0
3 years ago
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