Paula spots a glider located at an angle of elevation of 42 degrees. the distance between the glider and paula is 3280 feet. to the nearest foot, what is the height of the glider h from the ground?

Answers

Answer 1
Answer: This situation represents triangle with one angle of 90 degrees. That angle is directly below glider. That means that we can you basic trigonometry functions.

sin42 = h/3280

Now we express h.
h = 3280* sin42 
h = 2195 feet

The answer is 2195 feet.
Answer 2
Answer:

distance = 3280 feet. This is the triangle's hypotenuse.

The distance from the ground is the opposite side as it is opposite the angle 42˚


Sin = Opposite/Hypotenuse

Sin(42) = Opposite/3280   Answer: 2195 feet

Cross multiply

Opposite = sin(42) x 3280

Opposite = 2194.7 feet



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The greatest obstacle to developing solar energy is _____. lack of sunlight at high latitudes lack of sunlight at night lack of mechanisms for storing solar energy large areas required to collect sufficient energy

Answers

The correct answer is option #4. The greatest obstacle to developing solar energy is large areas required to collect sufficient energy. Solar energy is the energy that is the sun is producing and being converted into thermal energy that can be used for everyone's daily lives.

large areas required to collect sufficient energy


Use z scores to compare the given values. The tallest living man at one time had a height of 233 cm. The shortest living man at that time had a height of 91.4 cm. Heights of men at that time had a mean of 174.45 cm and a standard deviation of 6.36 cm. Which of these two men had the height that was more​ extreme?

Answers

Answer:

The man with the more extreme height is the man with 91.4 cm.

Explanation:

We have two values: 233 cm and 91.4 cm. The z score for every value is calculated as:

z=(x-m)/(s)

Where x is the given value, m is the mean and s is the standard deviation. So, the z score for every height is:

For 233 cm:

z=(233-174.45)/(6.36)=9.2059

For 91.4 cm:

z=(91.4-174.45)/(6.36)=-13.0582

Then, the more extreme value is 91.4 cm because the z score has the highest absolute value. This is:

For 233 cm

absolute z = 9.2059

For 91.4 cm

absolute z = 13.0582

Finally, The man with the more extreme height is the man with 91.4 cm.

When the source of a sound is moving it's speed increases

Answers

That statement is false, and pretty meaningless ... we don't know
whether "its speed" refers to the source or the sound.

When the source of a sound is moving relative to the listener, then
the listener may hear a higher- or lower-pitch sound than what the
source is actually emitting.

Answer:

false

Explanation:

The air temperature is 70 degrees, and the relative humidity is 90%. Which conclusion can be made?(1 point)The air holds little water vapor and is relatively dry.

The amount of water vapor in the air is 90% of what the air can hold.

The dew point temperature is 90% of the air temperature.

The temperature must rise in order for air to become saturated with water vapor.

Answers

Answer:

The amount of water vapor in the air is 90% of what the air can hold.

Explanation:

The answer is A

Answer: The answer is B: The amount of water vapor in the air is 90% of what the air can hold      

Can a simple machine’s efficiency ever be greater than 100%?
Explain your answer.

Answers

100% efficiency is not possible, so any greater than 100% is also not possible. There is always some energy waste, normally through heat, sound, or light
Personally, I believe not. 100% is the total, and therefore, it cannot possibly be above 100% percent, as this wouldn't then mean that the machine is efficiently beyond its means

What is the speed of a wave yhat has a frequency of 2.0Hz

Answers

You can't tell the speed of a wave from only its frequency.

You also need to know either the wavelength, or what substance
the wave is traveling through.

-- If you know the frequency AND wavelength, you can
calculate the speed.

-- If you know what substance the wave is traveling in, you can
probably determine its speed without knowing anything else about it.