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Elina [12.6K]
3 years ago
10

What is a​ placebo and why is it important?

Mathematics
1 answer:
Ksju [112]3 years ago
3 0

Answer:

A placebo is a fake put into place in order to make a user believe something is happening when it is not.

Step-by-step explanation:

A placebo is a fake put into place in order to make a user believe something is happening when it is not. This is used often in medicine, where a doctor may tell a patient they are receiving treatment for some condition, but in fact they are getting nothing. Often times this can actually make a change for the patient due to simply believing they are getting treatment. The placebo effect is also used in Statistics, with 2 groups, one getting the treatment, and one simply receiving a placebo. This is helpful because it shows the effect of treatment or medication more accurately.

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Three semicircles are placed in a rectangle, as shown below. The width of the 3 rectangle is 15 . Find the area of the shaded re
Leni [432]

Answer:

Step-by-step explanation:

Width of rectangle = 15 cm

width of rectangle is equal to the radius of each semicircle.

radius of each semicircle (r) = 15 cm.

Diameter of each semicircle = 30 cm

Length of rectangle = 3 x 30 = 90 cm.

Area \:  of  \: shaded  \: region \\  = Area \:  of  \: rectangle \\  \:  \:  \:  \:  \:  - 3  \times area \: of \: one \: semicircle \\  = l \times w - 3 \times   \frac{\pi {r}^{2} }{2}  \\  \\  = 90 \times 15 - 3 \times  \frac{3.14 \times  {15}^{2} }{2}  \\  \\  = 1350 - 3 \times  \frac{3.14 \times  225 }{2}   \\  \\   = 1350 - \frac{2119.5}{2}   \\  \\  = 1350 - 1059.75 \\  \\   \purple { \boxed{ \therefore \: Area \:  of  \: shaded  \: region = 290.25 \:  {cm}^{2}}}  \\

6 0
3 years ago
I need help with this math problem??
mr Goodwill [35]

Answer:

C

Step-by-step explanation:

.7

⅔= .666666

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8 0
3 years ago
100 POINTS, WILL MARK BRAINLIEST! Look at the attached picture
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Answer:

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Step-by-step explanation:

3 0
3 years ago
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The perimeter of a rectangle is 35cm. The length is 5cm. Write and
boyakko [2]

Answer:

P = 2L + 2W

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W = 12.5 cm

Step-by-step explanation:

P = 2L + 2W

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3 years ago
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3 · 32 + 8 ÷ 2 − (4 + 3)
Lorico [155]

Answer:

93 is your answer.

Step-by-step explanation:

What you want to do is PEMDAS.

<em>3 · 32 + 8 ÷ 2 − (4 + 3)</em>

<em>96 + 8 ÷ 2 - 7</em>

<em>96 + 4 - 7 </em>

<em>100 - 7</em>

93 is your answer.

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3 years ago
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