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1.A machine produces bolts which are 10% defective. Find the probability that in a random sample of 400 bolts produced by this machine, (a) at most 30 of the bolts will be defective (b) between 30 and 50 of the bolts will be defective (c) between 35 and 45 of bolts will be defective (d) 65 or more of bolts will be defective
2.The mean grade on a final examination was 72, and the standard deviation was 9. The top 10% of the students are to receive A's. What is the minimum grade a student must get in order to receive an A ?
3.How long would it take to fill a 30 yd^3 packer truck that compresses waste to 750 lb/yd^3 if it travels 100 ft between stops at an average of 5mph and it takes 1 minute to load 200 lb of waste at each stop? if each stop services four homes and two collections runs are made per day, how many customers could be provided with once per week service by this single truck(assuming a five-day week)?
A 440 -V shunt motor has armature resistance of 0.8 ohm and field resistance of 200 ohm . determine the back emf when giving an output of 7.64 KW at 85% efficiency
What reaction should we consider superinposed. Also what is this structures indeterminancy.
Devise an absolute temperature scale where the boiling point of water at 1 atmosphere (101 kPa) pressure = 100 degrees in your scale. What is the ice point of water in your scale
Three new cast iron pipes, having diameters of 24, 21 and 18 in respectively, each 450-ft long, are connected in series. The 24-in pipe leads from a reservoir (flush entrance), and the 18-in pipe discharges into the air at a point 15 ft lower than th..
A rectangular channel has water flowing at a depth of 1.6 ft with a corresponding specific energy of 1.736 ft. A step up on the channel bed resulte in the flow becoming critical. The critical depth is 1.29 ft and corresponding specific energy is 1..
Steam at 800 kPa and 300 C is bled off from a large supply line, passed through a valve, and allowed to enter an initially evacuated, uninsulated tank with a volume of 0.3 m3.
If the max load is applied to the cylinder (6"x12") or (150x300mm) up to P=500 kips, what would be the compressive strength of concrete for (a) cylinder, (b) 150mm cube, and (c) 200mm cube.
A roadway has a 4% grade intersecting a -7% grade at at station 18+50.00. The grades are connected by an 800 foot vertical curve. A sign is proposed to be installed at Station 15+00.00. The bottom of the sign is 7 feet above the roadway.
a beam having an overall length of 24 has a 4 overhang at one end. the left support is a pin connection and the right
A fire has destroyed thousands of acres of forest. Seedlings have been planted in the area but are being destroyed by the local wildlife. Develop a way to reforest the region by preventing the wildlife from eating the seedlings
The concrete girder supports the two column loads. If the soil pressure under the girder is assumed to be uniform, determine its intensity w and the placement d of the column at B.
The beam has a flange width b=8 in. If the maximum bending stress is not to exceed σallow=22 ksi, determine thegreatest weight of the machine that the beam can support. The center of gravity for the machine is at G, and the supports at Band C are smo..
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