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Questions (26)
Under what circumstances is
a. Proj(u onto v) — Proj(v onto «)? b. I Proj(u onto v) |= | Proj(v onto u) |?
1 answer
273 views
How much work is done against gravity by a workman carrying an 8-kg sheet of plywood up a 3-m ramp inclined at an angle of 20°
1 answer
321 views
Two tugs are towing a ship. The smaller tug is 10° off the port bow and the larger tug is 20° off the starboard bow. The
3 answers
634 views
A seal is on an ice shelf floating at 17 km/h N40oW when it
encounters a current of 5km/h from the south. On a nearby shore a
1 answer
209 views
An ant moves 4cm [N], then 3 cm [NW], then 8cm [W], and then 5cm on a bearing of 70 degrees.
a) Draw a diagram to show the
1 answer
265 views
A plane is capable of flying 180 km/h in still air. The pilot, Sofia, takes off from an airfield and heads due north according
7 answers
600 views
Two tractors, attached to a stump by chains, are being used to pull out the stump. One is pulling with a force of 4000N due
3 answers
401 views
A light aircraft with a cruising speed of 200km/h, flying in still air, first flew east for 1h 15 min, and then north for 3h. If
3 answers
401 views
A ferry boat crosses a river and arrives at a point on the opposite bank directly across from its starting point. The boat can
1 answer
481 views
A sailor climbs a mast at 0.5 m/s on a ship travelling north at 12 m/s, while the current flows east at 3 m/s. What is the speed
5 answers
417 views
If vector sv = vector tu, and vector u is not parallel to vector v, what are vector s and vector t?
3 answers
268 views
Find the magnitude and the direction (to the nearest degree) of the resultant of each of the following systems of forces
a.
1 answer
373 views
Legs for a wooden dining room table are produced by a computer numerically controlled (CNC) lathe. The cutting blade lasts a
1 answer
419 views
Explain why variability is inherent in data. Explain why other researchers may draw different conclusions?
1 answer
252 views
The United Nations published a statement that 2% of the world’s population has more than half the world’s wealth, whereas
1 answer
286 views
Calculate the percentile rank for each student’s quiz result in a grade 12 math class.
Mark Frequency 4.0 2 5.0 6 6.0 8 7.0 13
4 answers
1,318 views
Abia is one of three servers who work at a restaurant that is open from Tuesday to Sunday. Every week the servers randomly draw
4 answers
845 views
A fast-food restaurant is running a scratch-and-win contest. Customers scratch six squares on a card and try to match the six
3 answers
663 views
Even after twenty years of use, most quarters have the same shiny appearance that they did when they were minted. Most pennies,
4 answers
1,437 views
You receive requests to connect with people every day on your social media account.
If you have 15 requests to be “friends”
4 answers
1,248 views
The labels from six different cans of soup have come off. If you were to replace them at random, in how many ways could this be
2 answers
570 views
How many different numbers can be formed by multiplying some or all of the numbers 2, 3, 4, 5, 6, 7, 8?
4 answers
665 views
A spinner has six equally spaced sections numbered 1 to 6. You spin the spinner four times.
In how many ways could the spinner
3 answers
1,699 views
A security code consists of either five or six different letters. How many distinct security codes are possible?
5 answers
2,286 views
A motorcycle licence plate consists of two or three letters followed by four digits. How many licence plates can be made?
4 answers
1,601 views
5 a) How many even numbers can be formed from the digits 1, 2, 3, 4, 5?
b) How many of these numbers are greater than 3000?
4 answers
1,530 views
Answers (3)
what about the degrees
A motorcycle licence plate consists of two or three letters followed by four digits. How many licence plates can be made?
can someone answer part a
