An airplane takes off 200 yards in front of a 60 foot building. At what angle of elevation must the plane
take off in order to avoid crashing into the building?

Answer:

A or B, I think it's A...

1 cm — 500 km

1 cm — 500 000 m

1 cm — 50 000 000 cm

the scale — 1 to 50 000 000

Answer:

third option

Step-by-step explanation:

y = 1/2 x

Answer:

B

Step-by-step explanation:

y-y1=m(x-x1)

y-1=4(x-4)

Answer:

24

Step-by-step explanation:

Area of the 1st upright rectangle: 3x4=12

Area of 2nd rectangle: rectangle: 6x1=6

area of triangle: ((1st leg)x(2nd leg))/2=(4x3)/2=6

1st leg=4

2nd leg=6-3=3

12+6+6

24=area

Hope this helps :)

Let's say we had a sample of 100 people. We'll split them into two equal groups of 50 each. The two groups will be the treatment and control groups. The treatment group, aka experimental group, is where the actual drug is given. The control group is where the fake drug is given. People in the control group must not know the pill is fake. For more info, check out the placebo effect. In short, this is when a person takes a fake pill and thinks they get better, and that positive mentality helps them actually get better.  

If both the treatment and control groups improve (on average) together, then that means the fake pill is just as good as the real thing. Consequently, it means the real pill isn't effective at all. If on the other hand the experimental group does better overall compared to the control group, then we can see that the real pill is doing what it's intended to do. Of course, there are a lot of complicated factors involved, as there is with anything dealing with medicine. I haven't mentioned anything about side effects or things of that nature. In this simplified viewpoint of the world, we're only considering the one factor of whether or not the drug clears up the psoriasis on the skin.

To make things fair, it's best to randomly generate numbers so that you randomly assign people into each group. That way you have representative samples. Also, when drawing the sample of 100 people, make sure that's as random as possible to help represent the population as best as possible. The fact that the people in the control group not knowing that they are taking the fake pill means we have a single blind experiment. A double blind experiment is when even the researchers are not sure who is taking the real pill vs the fake pill. Double blind experiments are encouraged to prevent the researcher's bias from affecting the results.

To keep participants from knowing whether or not they are in the control group, the common solution is to provide a sugar pill. The pill will not cause any side effects and will not cause any improvements to health. It's simply sugar. To the participant, it seems like the real thing since they can't taste the difference or detect anything seems different.

Answer:

Randomly select a sample of people with psoriasis. Randomly assign them to one of two groups. Give one group the​ treatment, and withhold it from the other group. Give both groups similar looking​ pills, so neither knows which group they are in.

Answer:

A. 2

Step-by-step explanation:

From the diagram, it is indicated;

AD = DB = 3t,

AC = 7t + 6

CE = EB = 4t

Perimeter = 48 units

Perimeter = AD + DB + AC + CE + EB

Plug in the values

48 = 3t + 3t + 7t + 6 + 4t + 4t

Add like terms

48 = 21x + 6

48 - 6 = 21x + 6 - 6

42 = 21x

42/21 = 21x/21

2 = x

x = 2

Answer:

m<N = 130°

m<K = 50°

x = 28

Step-by-step explanation:

angle N and angle K are supplementary so the sum of their measures is 180°

4x + 18 + 2x - 6 = 180 add like terms

6x + 12 = 180 subtract 12 from both sides

6x = 168 divide both sides by 6

x = 28 to calculate the measurements of angle N and K replace x with 28

N = 4x + 28 so 4 × 28 + 18 = 130°

N = 2x - 6 and 2×28 - 6 = 50°

Answer:

2 terms

Step-by-step explanation:

Answer:

tjrjrkrkrkrkurjrjrjrjrnr s jkalsmrnrnd

Answer:

here you go hope this helps

Step-by-step explanation:

y= -3x + -4

Answer:

answer  in picture

Step-by-step explanation:

Answer:

12 and 78

Step-by-step explanation:

The sum of complementary angles is 90 degrees

X+(x-66) = 90

2x = 156    x =  78

78-66 = 12

Answer:

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Step-by-step explanation:

Answer:

195 yards

Step-by-step explanation:

I found three shapes in this irregular shape. the top rectangle is 8x13 which is 104 the middle rectangle is 7x9 which is 63 an the triangle at the bottom is 8x7 which is 56 but then you divide by 2 so it's 28 then you add that all and get 195.

Answer:

336 inches

Step-by-step explanation:

Answer:

base 1 + base 2 times height times half (basically dividing by 2) is the formula of a trapezoid. 25 + 35 = 60 x 21 = 1260 divided by 2 is 630

Answer:

look down

Step-by-step explanation:

multiply the number of lemons and sugar needed for 1 cup of lemonade by 10

so he would need 20 lemons and 30 cups of sugar.

Answer:

60

Step-by-step explanation:

Answer:

The answer is C, The use of Pi can be used to find the ratio of the diameter and circumference of a circle

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

Just explained a while ago

Step-by-step explanation:

Answer:

45

Step-by-step explanation:

If you write it out it will look like this, 2x+45+x=180

3x+45=180

3x+45=180

    -45   -45

3x=135

/3   /3

x=45

Answer:

x=45

Step-by-step explanation:

Straight angles/lines are equal to 180 degrees. If you add the equations together to get 180 and simplify you'll find the answer. So, start out with the equation 2x+45+x=180.

1. Add like terms. 3x+45=180

2. Subtract 45 from both sides. 3x=135

3. Divide by 3 on both sides to get x by itself. x=45

4. Just to make sure, plug in 45 for x. 2(45)+45+45=180. Sure enough, it works!

Answer:

y = 3x+7/2, and x = (2y-7)/6

Step-by-step explanation:

Answer:

Y=1/3x-1 is the correct answer in slope intercept form:)

Hopefully! this help.

Step-by-step explanation:

Answer:

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">

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   <mi>w</mi>

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 <mrow>

   <mn>2</mn>

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 <mrow>

   <mn>5</mn>

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     <mi>w</mi>

   </mrow>

   <mrow>

     <mn>4</mn>

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     <mn>1</mn>

   </mrow>

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     <mn>2</mn>

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</math>

Step-by-step explanation:

Answer:

The answer is C!

Step-by-step explanation:

Answer:

Have a greattt day;)

Step-by-step explanation:

Answer:

Step-by-step explanation:

5 min = 2.90

xmin = 7.86

with cross multiplication;

xmin = 7.86*5min/2.90

x = 13.55=14.0

therefore x = 14min

so he will make of 14min long

Answer:

This is an example of self selecting sampling

Step-by-step explanation:

This is an example of self selecting sampling because the news program is asking viewed to give their opinions. The viewers themselves have a choice of participating in the sample therefore is self selecting.

Answer:

0.27778m/s woulb be my average speed