If a sound travelling through a medium has a frequency of 520 Hz and a wavelength of
6.92 m, what is its speed?

3598.4 meter per second

Step-by-step explanation:

Frequency =520Hz

Wavelength =6.92m

Speed=wavelength x frequency

Speed=6.92 x 520

Speed=3598.4 meter per second

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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