Friday
May 6, 2016

# Posts by d

Total # Posts: 370

Trigonometry
a line which passes through the origin contains point A (-0.714, 0.700) . find the gradient of the line and the angle formed with respect to the positive x-axis in Degrees
March 30, 2016

physics
Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)
February 25, 2016

english
January 19, 2016

Chemistry
Pb + S yield FeS
November 1, 2015

ai
Ellen drove 240 miles in 3.5hours. To the nearest tenth, find Ellen's average speed in miles per hours
October 21, 2015

Math
What is the missing number from this number sentence? 7 ? 16 31 I'm always confused with this.
September 21, 2015

Math
What is the missing number from this number sentence? 7 ? 14 31 I'm always confused with this.
September 21, 2015

nto the solemn church, and scatter the congregation, Into the school where the scholar is studying, Leave not the bridegroom quiet—no happiness must he have now with his bride, Nor the peaceful farmer any peace, ploughing his field or gathering his grain, So fierce you ...
September 8, 2015

chemistry
44573.68
September 8, 2015

precalc
D(x) = x^2+2x E(x) = -2/(5x-1) D/E=
September 8, 2015

precalc
are these correct? 1) y=4 2) x=2 4) y=-3x-1 5) y+4=2/3x+1 6) y=4x+5
August 31, 2015

precalc
write a linear equation to fit each situation or description. 1) the line through (2,4) parallel to the x axis. 2) the line through (2,4) perpendicular to the x axis. 3) the line through (3,1) perpendicular to y=4x-3. 4) the line through (-2,5) parallel to y=-3x. 5) the line ...
August 31, 2015

pre-calculus
Rewrite each equation into slope intercept or special case form. 1) 4x+3=8x 2) 9y-(7+3y)=0 I have no idea how to do these two. Can someone please help me? 3)x/2+y/7=1 My answer is y=-7x+14. Is this correct?
August 29, 2015

pre-calculus
h(t)=15t + 1200 is a function that models the motion of a mountain climber. h(t) is his height above sea level at time t in minutes. 1a) the coefficient on t is 15. what does it tell you about the motion of the mountain climber? 1b) what does it tell you about the graph of h(t...
August 27, 2015

Chemistry
What is the sign of the entropy change for the following reaction, which is the principal process taking place when mortar hardens? Ca(OH)2(s) + CO2(g) ---> CaCO3(s) + H2O(l) Would the sign of entropy be negative since a solid and gas yields a solid and what does it mean by...
August 4, 2015

Chemistry
A 360-mL sample of hydrogen is collected when the pressure is 800 mm Hg. What is the volume that the gas will occupy when the pressure is 720 mm Hg? 360/x=720/800 28800/720=720x/720 400-mL=x Am I correct?
May 19, 2015

Math
Hint: 6% x \$1,000,000 / \$1,000,000 – {20% x (\$1,000,000 – (6% x \$1,000,000))] = ?
May 7, 2015

chemistry
Aqueous ammonia is commercially available at a concentration of 16.0 M. Part A How much of the concentrated solution would you use to prepare 500.0mL of a 1.30M solution?
April 13, 2015

english
1, 2, and 5 should be A. Am I correct?
March 31, 2015

english
can you please tell me if i'm correct or not? write A if the sentence is active or P if it is passive. 1. max and his uncle towed the car to a downtown garage. P 2. lightning hit our house during last night's storm. P 3. the opening remarks were made by the president ...
March 31, 2015

physics
If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 134 Hz? Answer in units of cm.
March 17, 2015

physics
The distance between two consecutive nodes of a standing wave is 22 cm. The hand generating the pulses moves up and down through a complete cycle 3.89 times every 4.68 s. Find the velocity of the wave. Answer in units of m/s
March 17, 2015

physics
An automobile having a mass of 1330 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 4.12 × 106 N/m and compresses 4.99 cm as the car is brought to rest. What was the speed of the car before impact, assuming no energy was lost...
March 17, 2015

physics
The body of a 1285 kg car is supported on a frame by four springs. The spring constant of a single spring is 2.80 × 104 N/m. Four people riding in the car have a combined mass of 275 kg. When driven over a pothole in the road, the frame vibrates and for the first few ...
March 16, 2015

math
how do you create of six values that does not represent a linear relation. All the y-values must increase in value as x increase in value?
March 4, 2015

math
Please help me on linear relation. I have tries but I am really stuck on the creating table and graphing. 1. provide a table of six values that represent a linear relation. All the y-values must be less then zero. 2. provide a table of six values that does not represent a ...
March 3, 2015

vocab
loquaciuos
February 13, 2015

physics
A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends find the moment of inertia
February 12, 2015

physics
A student holds two lead weights, each of mass 12 kg. When the students’ arms are extended horizontally, the lead weights are 0.82 m from the axis of rotation and the student rotates with an angular speed of 1.5 rad/sec. The moment of inertia of student plus stool is 5.5 ...
February 12, 2015

physics
A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends. Determine the angular momentum of the system about the origin at the instant the speed of...
February 12, 2015

physics
A cylindrical 9.16 kg pulley with a radius of 0.373 m is used to lower a 2.64 kg bucket into a well. The bucket starts from rest and falls for 3.94 s. What is the linear acceleration of the falling bucket? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s 2
February 11, 2015

physics
After coming down a steep hill at a constant speed of 49 m/s, a car travels along the circumference of a vertical circle of radius 329 m until it begins to climb another hill. What is the magnitude of the resultant force on the 170 kg driver of the car at the lowest point on ...
January 24, 2015

physics
A ball of mass 21.7 g is attached to a cord of length 0.61 m and rotates in a vertical circle. What is the minimum speed the ball must have at the top of the circle so the cord does not become slack? The acceleration of gravity is 9.8 m/s . Answer in units of m/s
January 24, 2015

math
I need help on this question. Can someone help me get through with these question The area of canada is approximately 1x10(Exponent)7, and the area of Mexico is approximately 2x10 (exponent)6 square kilometers. The area of Canada is approximately how many times the area of ...
January 21, 2015

math
Denise calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it
January 6, 2015

English
CHECK PLEASE? Is this a good analytical paragraph? Edgar Allen Poe’s poem, “The Bells”, uses personification and alliteration in order to establish a new tone for each stanza. Personification is used to create a transition in the stanzas, to differentiate the ...
November 18, 2014

Language Arts
Is this a good analytical paragraph? Edgar Allen Poe’s poem, “The Bells”, uses personification and alliteration in order to establish a new tone for each stanza. Personification is used to create a transition in the stanzas, to differentiate the tone change ...
November 18, 2014

english
wat the answr
November 6, 2014

Geometry
1.1.Determine whether the regular pentagon has reflection symmetry, rotation symmetry, both, or neither. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. For each type of symmetry, explain how you ...
October 17, 2014

Physics/science
2. An astronaut in orbit outside an orbiting space station throw her 800.0-g camera away in disgust when it jams. If she and her space suit together have a mass of 100.0 kg and the speed of the camera is 12.0 m/s.
October 15, 2014

Finance kennedy king
4. A firm's net income last year was \$1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?
October 13, 2014

Finance math
9. Compute the present value of \$4,000 paid in five years using the following discount rates: 10 percent in year 1, 2 percent in year 2, 12 percent in year 3, and 9 percent in years 4 and 5.
October 12, 2014

8
8. You invested \$2,000 in the stock market one year ago. Today, the investment is valued at \$9,500. What return did you earn? What return would you need to suffer next year for your investment to be valued at the original \$2,000?
October 12, 2014

7
6. You are scheduled to pay a \$350 cash flow in one year, and receive a \$1,000 cash flow in years 3 and 4. If interest rates are 10 percent per year, what is the combined present value of these cash flows?
October 12, 2014

6
6. You are scheduled to pay a \$350 cash flow in one year, and receive a \$1,000 cash flow in years 3 and 4. If interest rates are 10 percent per year, what is the combined present value of these cash flows?
October 12, 2014

5
5. Assume you borrow \$5,000 today and pay back the loan in one lump sum four years from today. You are charged 8 percent interest per year. What amount will you pay back and how much interest will you pay?
October 12, 2014

F
4. A firm's net income last year was \$1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?
October 12, 2014

Csu
3. What is the value in year 20 of a \$1,000 cash flow made in year 8 if interest rates are 15 percent in years 6 through 13 and increase to 18 percent in the remaining years?
October 12, 2014

Kennedy king
2. A \$5,000 investment has doubled to \$10,000 in ten years. How much longer will it take for the investment to reach \$15,000 if it continues to earn the same rate?
October 12, 2014

engineering mechanics
the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.
September 14, 2014

Math
Choose the best description for the real number 34/5 Irrational, because it is a fraction Irrational, because it is a repeating decimal Rational, because it is a fraction Rational, because it is a terminating decimal
August 28, 2014

Stats
the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.
April 6, 2014

chemistry
Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9°C, how much heat must be added to the water to raise its temperature to 28.7°C? Assume that the ...
March 25, 2014

Geometry
Can you please explain this to me?
March 13, 2014

Geometry
Find the area of the composite figure(right triangle), where the hypotenuse is 13m, base is 12m and the height is not given?
March 13, 2014

Physics
A rifle shoots a 4.1g bullet out of it's barrel. The bullet has a muzzle velocity of 975 m/s just as it leaves the barrel. Assuming a constant horizontal acceleration over a distance of 43.0 cm starting from rest, with no friction between the bullet and the barrel, what ...
February 20, 2014

math
do it yourself
February 13, 2014

physics
How do I calculate the radial acceleration in g's? For example: Calculate the radial acceleration (in g’s) of an object on the ground at the earth's equator, turning with the planet. Earth's radius is 6380 km.
February 3, 2014

Physics
A 26.2 g marble sliding to the right at 62.0 cm/s overtakes and collides elastically with a 13.1 g marble moving in the same direction at 15.5 cm/s. After the collision, the 13.1 g marble moves to the right at 77.5 cm/s. Find the velocity of the 26.2 g marble after the ...
January 8, 2014

Math
furry sack of balls
December 6, 2013

Chemistry
Describe the creation of 234 mL of a 3.2 M sodium chloride solution
December 2, 2013

physics
You walk 51 m to the north, then turn 30° to your right and walk another 45 m. How far are you from where you originally started?
November 14, 2013

physics
I figured it out. 130N. I forgot about gravity.
November 2, 2013

physics
a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second. What is the average ...
November 2, 2013

GEOMETRY
5√3/3 Can somebody evaluate this PLEASE!!!!!!
October 21, 2013

GEOMETRY
simplify 5√3/3
October 21, 2013

GEOMETRY
no i dont have a calculator thats why im asking what it is? can you please give me the answer. this is the last problem 2 my homework and i can't figure it out
October 21, 2013

GEOMETRY
i need it simplified to the nearest 10th
October 21, 2013

GEOMETRY
simplify 5 squareroot(3)/3
October 21, 2013

u.s history
Where did John Wilkes Booth shoot Abraham Lincoln?
October 18, 2013

u.s history
How did the Civil War end?
October 18, 2013

u.s history
How did the Civil War affect women?
October 18, 2013

health
Whats the largest bone in your body?
October 16, 2013

GEOMETRY
44411001444
October 16, 2013

GEOMETRY
parallelogram with a side of 40in a base of 36in and a height of 33in. WHAT IS THE AREA?
October 16, 2013

Math
A couple needs \$15,000 as a down payment for a home. If they invest the \$10,000 they have at 8% compounded quarterly, how long will it take for the money to grow into \$15,000?
October 9, 2013

Calculus
Finf (dy/dx) y=(1+28x^3)f(x)+(6x)g(x)(x^4+5x+7)+(6x)g(x)(x^4+5x+7)-(e^x+7x^4)f(x)+3x^2g(x)(4x^3+5+7)/((x^4+5x+7)^2
October 6, 2013

physics
A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of What is the maximum ...
September 26, 2013

troy
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
September 24, 2013

math
The owner of a service station receives a loan of \$8,500 at 10.5% for 7 months. Find the amount of simple interest
September 20, 2013

Calc
Sqrt(xyz) I rewrote it has x^(1/2)*y^(1/2)+z^(1/2) And the derivative with respect to x is Sqrtyz/(2sqrtx) is that right
September 20, 2013

math
-x/y^2 = x/(1/y) is that a true statement?
September 19, 2013

choice
Varsity Press, a publisher of college textbooks, received a \$70,000 promissory note at 12% ordinary interest for 60 days from one of its customers, Reader’s Choice Bookstores. After 20 days, Varsity Press discounted the note at the Grove Isle Bank at a discount rate of ...
September 16, 2013

math
From 70 feet away from the base of a tree on level ground, the angle to the top of a tree is 60⁰. What is the height of the tree? What is the approximate distance from the vantage point to the top of the tree, to one decimal point? (Assume that the tree is perpendicular ...
June 12, 2013

Algebra
9 more than 2 times x
June 9, 2013

physics
if the * is the degrees, then you need to draw the vectors according to their direction. you can use a graph paper and make your own scale: say one unit cube is 10km/hr. then use the protractor to draw the vectors taking an horizontal line as zero degrees. then draw the ...
June 6, 2013

Science
which of the following is an example of a mineral? silver, lava, fossils, sand, I say Lava
May 15, 2013

statistics
9,873.35
April 23, 2013

stats
suppose that a population of people is 1200. .25 of the population is white. we take a random sample of 100 people. What is the probabilit that more than .29 of these people are white?
April 16, 2013

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