Profit from bolts +profit from nuts=76,378 Profit from bolts+ (3,428+profit from bolts)= 76,378 2•profit from bolts =86,378-3,428 Profit from bolts =82,950/2 Profit from bolts= $41,475
70dB is represented by 100cars in 60sec. Therefore if the number of cats is reduced by 3/4 in the same amount of time(60s), then the decibel level will reduce by 3/4 also. So 70dB * .25= 17.5dB
