High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. Cockpit noise in a jet aircraft is mostly due to airflow at hundreds of miles per hour. This 3 x 3 contingency table shows 61 observations of da collected by an airline pilot using a handheld sound meter in a certain aircraft cockpit. Noise level is defined as "low" (under 88 decibels). "medium" (88 to 91 decibels), or "high" (92 decibels or more). There are three flight phases (climb, cruise, descent). Cockpit Noise Flight Phase Cruise (C) Noise Level CLimb (B) Descent (D) ROw Total Low (L) Medium (M) High (H) 2. 4 14 17 31 21 11 16 Column TotaL 27 13 21 61 Click here for the Excel Data File (a) Calculate the following probabilities: (Round your answers to 4 declmal places.) P(B) H.P(L) P(H|C) 0.4426 0.2205 0.2308 iv. P(HID) V. P(L and B) vi. P(L and C) (b) Do you see evidence that noise level depends on flight phase? O Yes O No

The answer is 3 over 5 ?

Ruth and Jerry go for an outing in a park. Ruth jogs while Jerry rollerblades. Jerry rollerblades 2.9 miles per hour faster than Ruth jogs. When Jerry has rollerbladed 5.7 miles, Ruth has jogged 3.4 miles. Determine Ruth’s jogging speed.

There is a mound of g pounds of gravel in a quarry. Throughout the day, 300 pounds of gravel is added to the mound. Two orders of 500 pounds are sold and the gravel is removed from the mound. At the end of the day, the mound has 1,100 pounds of gravel. Solve for g. 9 = Number pounds.

The formula C=9+2.45h gives the cost C of renting a rug shampooing machine for h hours. Write and simplify the cost of renting m machines for h hours.

Link can ride his bike 20 miles into a 3 mph headwind in the same amount of time he can ride 30 miles with a 3 mph tailwind. What is Link’s speed?

3x +4x +5 = 19 %3D

Wade can skateboard 2.8 miles against a 2.4-mph wind in the same amount of time he skateboards 5.2 miles with a 2.4-mph wind.  Find the speed Wade skateboards with no wind.

3x-2=13

Nicolas has gone up to the chalkboard to do math problems 7 more times than Briana. Nicolas has gone up 12 times. Which equation represents this situation? *