15. A mosquito flaps its wings 800 vibrations per second. What is the frequency of the buzz?
What is the period of the buzz?
Assuming sound
travels at 340 m/s, how far does the sound travel between wing beats? (wavelength of
the sound)

0.57 meters

Step-by-step explanation:

peed = wavelength x frequency

wavelength = speed/frequency

= (340 m/s)/(600 Hz)

= 0.57 meters

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.