0
At a certain time of the day a tree 15 m tall casts a shadow of 12 m while a second tree casts a shadow of 20 m How tall is the second tree?
By Similar Triangles.
#1 is 15/12
#2 is x /20
Equating
15/12 = x/20
Algebraic rearrangement
x = 15 x 20 / 12
x = 300 /12
x = 25 m.
What else can I help you with?
How would a data set containing the values of a variable with a mean of 50 and standard deviation of 2 compare with a mean of 50 and standard deviation of 20?
The first set would have most data points very close to 50 while in the second set they would be much further away.
Differences between null and alternative hypothesis?
The difference between the null hypothesis and the alternative hypothesis are on the sense of the tests. In statistical inference, the null hypothesis should be in a positive sense such in a sense, you are testing a hypothesis you are probably sure of. In other words, the null hypothesis must be the hypothesis you are almost sure of. Just an important note, that when you are doing a tests, you are testing if a certain event probably occurs at certain level of significance. The alternative hypothesis is the opposite one.
What are the chances of being shot as a cop?
The first answer wasn't valid at all. The first answer 5 out of 3 doesn't make sense. It would depend a lot on where you were enforcing the law as well as what type of law enforcement you do. Someone in Tokyo would have almost no chance, while someone in Bahgdad would be almost certain to have a gunfight at soome point. In the US it is uncommon for the average policeman to ever fire his weapon in the line of duty, except at the range.
How many possibilities are there with the four digit numbers 0000-9999 while the first number cannot be 0 or 9?
The first digit can be any one of 8. For each of these . . .The second digit can be any one of 10. For each of these . . .The third digit can be any one of 10. For each of these . . .The fourth digit can be any one of 8.Total possibilities = (8 x 10 x 10 x 8) = 6,400
What are quadrants of a graph?
Divide the graph into 4 parts and each part is a quadrant. Traditionally, we use the x and y axis to divide it. The portion of the graph with positive x and y coordinates is the first quadrant, The second has positive y values and negative x values, while the third quadrant has both negative x and negative y values. The last is the fourth quadrants which is below the first quadrant. It has positive x values and negative y values. If you made the origin, the point (0,0) the center of a clock, the first quadrant is between 3 and 12 and the second between 12 and 9, the third between 9 and 6 and the fourth between 12 and 3.
At a certain time of the day a tree 15m tall casts a shadow of 12m while a second tree casts a shadow of 20m how tall is the second tree?
25 meters because 25/20 = 15/12 which is the tangent ratio.
A tower casts a shadow 48 m long Tom is 2 meters tall and casts a shadow 8 meters long while standing in the tower's shadow How tall is the tower?
As the question is stated, Tom is standing IN THE TOWER'S SHADOW. If so, then Tom can't cast a shadow of his own, because he is not illuminated. Let's assume the question means to imply that Tom's shadow is measured AT THE SAME TIME that the shadow of the tower is measured, and kind of NEAR the tower, so that the sun casts both shadows from the same place in the sky. If this is a valid assumption, then the tower is 12 meters tall.
A tree casts a shadow that is 20 feet long Frank is 6 feet tall and while standing next to the tree he casts a shadow that is 4 feet long How tall is the tree?
The ratios are in the same proportion, so all you need to really figure out is what is in the same ratio to 20 as 6 is to 4.
Does the shadow casts on the moon cover totally the entire lunar surface?
During a full lunar eclipse, the visible half of the moon's surface is in the Earth's shadow while the rest does not receive sunlight because it is facing away from the Sun. Lunar eclipses occur during full moon phases.
How tall is the pole if the pole casts a 24-foot shadow and a 3 and one half foot tall boy casts a 6-foot shadow while standing beside the pole?
Answer is 14 feet
Where will the shadow fall while looking at the rainbow?
the shadow will famll east
The presence of white blood cell casts in the urine is indicative of pyelonephritis and red blood cell casts indicative of glomerulonephritis?
White blood cell casts in the urine are typically associated with acute interstitial nephritis, while red blood cell casts are more commonly seen in acute glomerulonephritis. Pyelonephritis is usually characterized by the presence of white blood cells in the urine without casts.
Why can some areas on earth see the solar eclipe and not others?
During a solar eclipse, the moon passes between the Earth and the sun, casting a shadow on the Earth. Areas that are in the path of this shadow will experience the eclipse, while areas outside of the path will not. This creates the variation in visibility of the solar eclipse across different regions on Earth.
What is least darker than the umbra?
The umbra is the darker area of complete shadow, while the penumbra is a lighter area that is only partly shadowed. You can demonstrate this at home. Set up two lamps a couple of feet apart. Hold up a beach ball or sheet of cardboard smaller than the separation, several feet away from the lamps. Each lamp casts light in all directions, and the obstruction casts a shadow - a separate shadow from each lamp. Where both lamps' shadows overlap, this is the umbra. Where one lamp is lighting up the shadowed area from the other lamp, this is the "penumbra".
What are the two shadows casts from as eclipse?
A solar eclipse happens when the Moon casts two shadows on Earth: the umbra, which is the darkest part of the Moon's shadow, and the penumbra, which is the lighter part. The umbra creates a total eclipse where the Sun is completely blocked, while the penumbra creates a partial eclipse where only part of the Sun is blocked.
What does it mean when you have hilussionations of some sort of curved woods while sleeping?
Because the Tooth Fairy casts a spell on you.
Why do birds not cast their shadows while flying high in the sky?
Birds flying up in the sky do not cast their shadow because the source of light (sun) is too large compared to the object (bird) and the umbra of the shadow formed on the screen (ground) is very small, negligible.So it is tough to see its shadow on the ground. (P.S. If this is a VNS student reading this for Physics research, then I'm pretty sure you're in my grade and you know who I am)
