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Helen
Questions and answers by visitors named
Helen
Questions (401)
If set M consists of all integer numbers x such that 3<x<7, and set N consists of all integer numbers x such that 6≤x≤9,
5 answers
1,622 views
It takes a boat going upstream 3 hours to cover the same distance, as it would cover in 2 hours going downstream. What is the
7 answers
asked by
Helen
6,317 views
How many 4-digit numbers are neither multiples of 2 nor multiples of 5?
5 answers
3,608 views
An initial population of 298 quail increases at an annual rate of 8%. Write an exponential function to model the quail
4 answers
6,783 views
How many 2-digit numbers are multiples of 2 but not 4?
7 answers
2,353 views
For what natural values of n:
is the sum (−27.1+3n)+(7.1+5n) negative?
4 answers
1,574 views
Words to choose from: Commemorate, complacent, consensus, deplete, diligent, empathy, menial, niche, transcend, and waive
At
12 answers
7,609 views
an empty rubber balloon has mass 0.0120kg, the balloon is filled with helium of density 0.181 kg/m^3. the balloon is spherical
5 answers
asked by
Helen
3,067 views
A man 1.5m tall is 15m away from a tower 20m high.What is the angle of elevation of the top of the tower from his eyes?
6 answers
2,476 views
There are two ways of scoring points in a ball game: a ‘major’ scores 5 points and a ‘minor’
scores 3 points. In a match
5 answers
2,261 views
An airplane is pressurized to 650mm Hg, which is the atmospheric pressure at a ski resort at 13,000ft altitude.
a. if air is 21%
4 answers
7,161 views
Without building the graph, find the coordinates of the points of intersection of the graph of the equation (x+2)(y+3)=0 with
4 answers
1,250 views
If 10.6 mol of carbon monoxide is produced how many grams of carbon were used?
How do you convert moles to grams? And what are
3 answers
1,049 views
His first fight was for his health and vigor. It all began at the age of nine. As a child, he was weak and thin because of his
7 answers
845 views
Write the expression as a cube of a monomial.
– 8/27a^15
4 answers
1,536 views
Fill in the missing parts:
(5x + ___)^2 = ___ · x^2+70xy + ___
4 answers
2,037 views
Students perform an experiment using a circuit that contains the two parallel plate capacitors C1=10μF and C2=40μF. Come up
5 answers
2,585 views
A store sells packages of 48 Snickers bars for $28 per package, and packages of 36 KitKat bars for $22.50 per package. Mrs.
7 answers
3,174 views
How do you know whether a system of equations has no solution, one solution, ormany solutions?
How can you identify whether a
2 answers
599 views
x^2+x=12
Since you do not ask a specific question, I assume that you want to find the factors. x^2 + x - 12 = 0 From the above,
1 answer
330 views
What are the Lewis structures for hydrogen cyanide and cyanogen??
I think it's H:C:::N :N:::C:C:::N: with the inner upper
1 answer
617 views
Rank these in order of increasing freezing points:
C2H6O, NaCl, NaSO4, C12H22O11 I suggest that you look them up. You will have
1 answer
581 views
predication
1. The reason for the cat's illness is because she was allergic to the dog. 2. The driving exam is when one is tested
2 answers
576 views
Suppose the amount of heat removed when 3.0kg of water freezes at 0 degree C were removed from ethyl alcohol and its
6 answers
3,401 views
Suppose the amplitude and frequency of a transverse wave are, respectively, 1.3cm and 5.0Hz. Find the total vertical distance
4 answers
1,103 views
How would I calculate exponential regression?
1 answer
443 views
n=15 and there are 3 groups
These data are analyzed by an ANOVA, and the resutls are reported in the following summary table.
3 answers
548 views
similarities between and oxidative phosphorylation and photophosphorylation
1 answer
404 views
Can someone provide me the help to explain this statement:
"An important step in the history of life on Earth was the evolution
1 answer
312 views
last question about bio
Explain the statement below: “ Biological evolution began when cells formed”
1 answer
944 views
How to build tetrachords for the following staffs: G, F, A, E, C#,
1 answer
369 views
At 1200 K, the approximate temperature of vehicle exhaust gases, Kp for the reaction
<- 2CO2(g) -> 2CO(g) + O2(g) is about
1 answer
497 views
At 1200 K, the approximate temperature of vehicle exhaust gases, Kp for the reaction 2CO2(g)⇄2CO(g) + O2(g)
is about 1*E-13.
2 answers
561 views
Under what circumstances do you need to perform dilution(s)?
1 answer
319 views
I Need help with the following question:
If moe has 3x as many singles as larry, and Larry has 4X as many doubles as curly. How
3 answers
479 views
A vehicle starts w/ a full tank of gasoline and travels 150 miles. While refilling the tank, the driver notes that the vehicle
4 answers
1,358 views
A pine tree casts a 12-meter shadow on level ground. The angle of elevation from the tip of the shadow to the top of the tree is
1 answer
1,028 views
A diameter of circle that has endpoints (-4,12) and (8,-2), as shown below, is in the standard (x,y) coordinate plane. What
1 answer
492 views
Each element in a data set is multiplied by 2, and each resulting product is then increased by 5. If 'm' is the mean of the
2 answers
569 views
Each element in a data set is multiplied by 2, and each resulting product is then increased by 5. If 'm' is the mean of the
4 answers
684 views
If a,b,c,d, and x represent positive real numbers, what is the maximum value of the function f(x)= a[cosb(x+c)]-d?
4 answers
1,550 views
Considering all values of x and y for which x+y is at most 7, x is at least 2, and y is at least -1, what is the minimum value
5 answers
1,015 views
A pine tree casts a 12-meter shadow on level ground. The angle of elevation from the tip of the shadow to the top of the tree is
3 answers
1,174 views
Considering all values of x and y for which x+y is at most 7, x is at least 2, and y is at least -1, what is the minimum value
3 answers
281 views
Considering all values of x and y for which x+y is at most 7, x is at least 2, and y is at least -1, what is the minimum value
1 answer
326 views
An instrument store gives a 10% discount to all students off the original cost of an instrument. During a back to school sale an
3 answers
1,186 views
a 4.8 force acts on a 4.4 kg mass that sits on a frictionless table for 6.4 meters. What is the Kinectic Energy that the object
1 answer
307 views
a 4.8 force acts on a 4.4 kg mass that sits on a frictionless table for 6.4 meters. What is the Kinectic Energy that the object
2 answers
898 views
who was president during Muller vs. Oregon? Roosevelt or Taft?
4 answers
482 views
Why is it important to use caution before putting any personal information on a computer? (example(s) required)
I think everyone
2 answers
486 views
i need help with answering homework questions
2 answers
474 views
If the median is greater than the mean on a set of test scores, describe the situation.
1 answer
473 views
How are the family
1 answer
257 views
Sometimes it took days until I could pull out the artifact that had staring me in the face, and not doing so beforehand had
1 answer
274 views
The field school was an amazing and eye-opening experience in which I was able to travel to an area I had never visited before
3 answers
326 views
1) "I would like to learn as much as possible as soon as possible"
Should there be a comma after the first "possible?" 2)"The
1 answer
304 views
1) Their kindness will give me the gift of patience...
does this sound okay? 2)In this method, I could learn from different areas
2 answers
890 views
Is the grammar in the following sentence ok?
For, surely, the paintings were created by people who were not so different than
6 answers
677 views
I remember instances where I fell.
when or where ?
4 answers
827 views
We all Crave Horror Movies essay by Stephen King
What does King mean in paragraph 4 when he says that horror movies are
1 answer
798 views
a driver who drives at a speed of r mph for t hr will travel a distance d mi given by d = rt miles. How far will a driver travel
5 answers
1,337 views
translate to an algebraic expression.
13 less than b
7 answers
730 views
The four tires of an automobile are inflated to an absolute pressure of 200000 Pascals. Each tire has an area of 0.024 m^2 in
3 answers
503 views
name 2 homes where some of the most famous authors of Florida have lived and visit at least 2 places they have described in
6 answers
442 views
I need help with these problem please.
X^2+6=15 (x+4)^2=6 can some one help me please.
1 answer
267 views
-9(x-3)^2=-7
^3square root 4/3
1 answer
285 views
How does division work? Can you describe a picture of what happens during division?
1 answer
337 views
Can i combine the following? Explain why or why not.
5x+4x(squared) 7x(cubic)-2x+x(cubic)-5x 3xy+2y
3 answers
343 views
Simplify the following (6b-2)(6b+2)+4(b^2-3b)
Find the factors of the following e^2+8e+15 5f^2-15f+10 Does g^2-9 have factors? If
3 answers
349 views
We're reviewing and I forgot how to do this.
Given y=x2-4+3 (x2 is x squared) a)write in standard from b)find vertex c)find
2 answers
529 views
calculate cell potential at 25C for:
3Fe3+(aq) + AL(s)= 3Fe2+(aq)+ Al3+ (aq) if Fe3+ = 0.300 M, Fe2+ = 0.150M Al3+ = 0.300M. The
3 answers
2,254 views
A volume of 25.0 ml of 0.100 M CH3C02H is titrated with 0.100 M NaOH. What is
pH after the addition of 12.5 ml of NaOH? (Ka for
3 answers
700 views
A volume of 25.0 ml of 0.100 M CH3CO2H is tiltrated with 0.100 M NaOH. What is pH after the addition of 12.5 mL of NaOH? (Ka for
1 answer
406 views
Calculate pH of 0.02 mol/L Ba(OH)2 solution. (Assume 100% dissociation).
1 answer
351 views
What is pH buffer of 0.1 mol L-1 Na2HPO4/O.15 mol L-1 KH2PO4?
KH2PO4? Given Ka(H2PO4-) = 6.2 x 10-8). I would like to know the
4 answers
2,608 views
Given following reduction potentials in solution. Which is weakest oxidising agent in the list. List of numbers on right is for
2 answers
574 views
Which is the correct form of equilibrium expression of the following reaction.
2PbS(s)+3O2(g)reverse arrow 2PbOs + 2SO2g Why is
3 answers
1,833 views
Police records in the town of Saratoga show that 18 percent of the drivers stopped for speeding have invalid licenses. If 16
2 answers
746 views
The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 575 MPa with a standard
2 answers
515 views
The probability of a manufacturing defect in an aluminum beverage can is .00003. If 100,100 cans are produced,
(a) Find the
1 answer
837 views
At an outpatient mental health clinic, appointment cancellations occur at a mean rate of 1.60 per day on a typical Wednesday.
2 answers
980 views
In a certain store, there is a .05 probability that the scanned price in the bar code scanner will not match the advertised
2 answers
895 views
I'm having a hard time understanding how to fine the Total Area(T.A) for a regular pyramid.
1 answer
453 views
1. Nitrogen gas and sodium liquid are produced by the decomposition of sodium azide NaN3 (s). what volume of nitrogen gas,
5 answers
1,060 views
The approximate vapor pressure of CS2 at 30 degrees Celsius?
1 answer
898 views
Complete the table below:
For each of the following sets pick the compound with the highest conductivity in a 1 M aqueous
19 answers
638 views
VWXYZ is a rectangle-based pyramid where WX=66 cm and XY=32cm. The vertex is vertically above the center of the base. Given that
6 answers
2,349 views
Two 125 kg bumper cars are moving toward each other in opposite directions. Car X is moving at 10 m/s and Car Z at –12 m/s
4 answers
1,597 views
what is 4a-7=4(a-2)+1?
1 answer
244 views
How do I solve for:
5000 = 45t^2 + 240t + 450
1 answer
349 views
Could someone please help me with this question?
What is the relationship to the law and the government structure as it applies
4 answers
595 views
Could someone please help me with this question?
What are crime rates? This is what I have so far: Crime rates are the number of
3 answers
560 views
Could some please help me with this? I am not sure what to really say. Thanks!
Describe the historical development of police
1 answer
340 views
What influence does culture have on personality? Do you see a persons reaction to something as separate from social experience
3 answers
546 views
Why is oxygen less soluble in water as temperature of the water increases ?
Are there any elements that are like this too?
1 answer
448 views
Assume that there is a perfect competition market for a good X. If one supplier all of a sudden wins the lottery and buys all
1 answer
513 views
For any distribution (normal or not normal), the probability of selecting a score greater than the median is
4 answers
1,150 views
farmer has 10 trees see if you can plant them so there are 5 rows of trees with 4 trees in each row
4 answers
2,896 views
A car traveling at 120 strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.90 .
Wh
3 answers
594 views
A car traveling at 120 strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.90 .
Wh
2 answers
762 views
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