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mel-nik [20]
2 years ago
5

Hii please help i’ll give brainliest

Mathematics
1 answer:
wlad13 [49]2 years ago
5 0
The answer is C I believe:)
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Sound travels through a guitar string at 600 m/s, making a sound wave in the air with a speed of 333 m/s. In 1–2 sentences, expl
Shalnov [3]

Answer:

Step-by-step explanation:

Wave velocity of the sound = frequency * wavelength.

The frequency and wavelength depend on the medium through which the sound passes and they are both greater in the guitar string than in air as the string is denser than the air. So the sound travles faster through the guitar string.

4 0
2 years ago
Suppose the test scores on an exam show a normal distribution with a mean of 82 and a standard deviation of
Zanzabum

Answer:

a) Between 74 and 90

b) 81.86% of the scores are between 78 and 90

Step-by-step explanation:

a) According to the Empirical Rule, in a normal distribution, 95% of the data are within 2 standard deviations of the mean. Therefore, the range that 95% of the scores fall in is between 82-4(2)=74 and 82+4(2)=90.

b) The percent of scores that are between 78 and 90 is: normalcdf(lower,upper,μ,σ) = normalcdf(78,90,82,4) = 0.8185946784 ≈ 0.8186, or about 81.86% of the scores.

5 0
2 years ago
A young equestrian loved to ride her horse all day long, dreaming of the day she would ride in the Kentucky Derby. One day in ea
Vsevolod [243]
The first step is:
- determine how far from the house is young equestrian at noon. 
2 x 10 = 20 miles
15 t = 20 + 10 t
15 t - 10 t = 20
5 t = 20
t = 20 : 5
t = 4 hours
Answer: at 4:00 PM. 
6 0
3 years ago
Verify sin4 x- sin2x = cos4x – cos2x is an identity
Andrej [43]

Step-by-step explanation:

sin⁴ x − sin² x

Factor:

(sin² x) (sin² x − 1)

Pythagorean identity:

(1 − cos² x) (-cos² x)

Distribute:

-cos² x + cos⁴ x

cos⁴ x − cos² x

6 0
3 years ago
Clare mixes 2 1/2 cups of water with 1/3 cup of orange juice concentrate.
Lisa [10]

Answer:

We can see that the orange juice mixture tastes stronger in Clare mixture as it has more orange juice than Han's mixture, so hers will Clare's will have more taste.

(:

4 0
3 years ago
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