Answer:
b.-12
Step-by-step explanation:
kamehameha This ans
Whisper-20dB
Quiet Residence-30dB
Soft stereo in Residence-40dB
Average Speech-60dB
Cafeteria-80dB
Pneumatic Jackhammer-90dB
Loud crowd noise-100dB
Accelerating Bike-100dB
Rock concert-120dB
Jet Engine (75 ft away)-140dB
(1)Mode=100dB (since 100 is occurring the maximum no. of times, i.e. it has the highest frequency of 2)
(2)Mean=sum of observations/Total number of observations
=(20+30+40+60+80+90+100+100+120+140)/10
=770/10=10dB
(3)Median= 1/2[{n/2}th observation + {(n/2)+1}th observation], where, n=total no. of observations
So, 1/2[{10/2}th observation + {(10/2)+1}th observation]
=1/2[5th observation+6th observation]
=1/2[80+90] [Because:5th observation=80dB and 6th=90dB]
=1/2(170)
=85
Therefore, median=85dB
Answer:
ST = x = 1.8 (to the nearest tenth)
Step-by-step explanation:
STU is a right triangle right angled at T with S =61° and hypotenuse SU=3.7 units.
ST = x = SUcos(61°) = 3.7cos(61°) = 3.7*0.48481 = 1.7938
Answer:
Can you explain this more
Step-by-step explanation:
Answer:
D. undefined
Step-by-step explanation:
Since, line is perpendicular to x-axis, so it's slope would be undefined.
Hope it helps you in your learning process.
