2.2 A veteran rock drill operator who has been exposed to about 112dB noise during his 25 year working career has his ears tested. The audiometer records the following hearing loss for his ears measured in dB. Left Ear Right Ear Frequency Hertz 30 45 55 65 60 a) Calculated his binaural Hearing Impairment b) Does he have a permanent disability? 2398228 30 125 250 500 1000 2000 4000 800

Q: メ+1

A:

Q: 4. 3. 4, 8.

A:

Q: 7+3.5-11

A: Let's Solve,

Q: 1/3+2/9

A: Given 1/3 + 2/9

Q: dactonive: 2. 2.

A: To factorise x2y2z2-16 ⇒x2y2z2-42 We know that a2-b2=a+ba-b Here a=xyz and b=4

Q: 1+ cos(x) (c) 1+ sin(x) tan dx Hint: Use the substitution t

A:

Q: 3 1/4 + 7 1/8

A:

Q: 7/2 + 3 4/6

A:

Q: 5/14+1/6

A: 514+16=15+742

Q: 6 Find mLABE. (3x +4) (5x-2)*

A:

Q: 196. 2(n+1)

A:

Q: 2 3 B={ A= 3 Find: A+B .B+A .A-

A:

Q: 1+7/7 + 8

A: Answar would be 10

Q: 4root2*4root2

A:

Q: 9/12+3/24

A:

Q: 9 b and c

A: b) We check if the denominator is 0 for any value of x.  2x2+5=0 2x2=-5 x2=-5/2 (not possible) So…

Q: Find A.

A:

Q: 6. 6. х 14

A: Given: 9x=x14

Q: How many terms are there in the expansion of (4.x + 7y)0.+ (4x- 7y)10 ?

A:

Q: 4(5+6)=

A: Given: 4(5+6)=

Q: 3/8+5/24

A: The given expression is 3/8 + 5/24.Simplify the given expression as follows.

Q: Finding the LCM of 4,5

A: Given,            LCM of 4,5.

Q: ne binomial:

A:

Q: 3. Find L-¹{√534}. (s+3)

A:

Q: 4. Fill in the following contingency table with the number of observations that fall into each com-…

A: x1 = number of colored oranges from Skittles brand = 77 x2 = number of colored oranges from M &…

Q: 7

A:

Q: 57-24

A: Given that: 57-24

Q: (2) 4 2. 2. 2/3

A: