Sunday
April 20, 2014

Posts by Vincent


Total # Posts: 130

science
Explain why Na2CO3 against HCL titration using phenolphthalein indicator does not go to completion but stops at the NaHCO3 stage.

social studies
what were roles of men in Iroquois league?

Vector Calculus
Thermodynamics texts use the relationship (dy/dx)(dz/dy)(dx/dz) = -1 Explain the meaning of this equation and prove that it is true (Hint: Start with a relationship F(x,y,z) = 0 that defines x = f(y,z), y = g(x,z), and z = h(x,y) and differentiate implicitly)

math
not just answer and tell me how to do it

math
The length of the rectangle is 20 m and the width of the rectangle is 10 m. Inside the rectangle have two circle, If we know that both circle are the same and they are tangent to the rectangle? What is the shaded area? A. 200 - 20 pi m^2 B. 200 - 50 pi m^2 C. 100 pi - 200 m^2 ...

math
The fraction 5Y3X/2Y8, in which X and Y stand for unknown digits, represents a division which results in a quotient that is whole number. Which of the following is (are) true? not just and answer please I. X may equal 2. II. X may equal 6 or 0. III. X may equal 4. A.I only B.I...

math
I. X may equal 2. II. X may equal 6 or 0. III. X may equal 4. A.I only B.II only C.III only D.I and III only E.I,II,and III

math
The fraction 5Y3X/2Y8, in which x and Y stand for two unknown digits, represents a division which results in a quotient that is a whole number. Which of the following is (are) true? 1. X may equal 2. 11. X may equal 6 or 0. 111. X may equal 4. not just and answer, i don't ...

math
x + 2y = 1 1/3 +x - y =+1/3 3y = ? not just and answer A.0 B.- 1/3 C.1/3 D.1 E.1 2/3

math
ok

math
but i'm not so good at subsets can you explain, so i can maybe understand in a different way.

math
which of the following sets is a subset of A? A:5,25,15,10,20,30 not just and answer A.5,15,60 B.10,20,50 C.5,10,20 D.15,30,60 well i got the answer C

math
thanks

math
mm, less

math
so it is 4315-1345= 2970

math
If in the number 4315 the digits representing tens and thousands were interchanged, the value of the new number formed in relation to the original number would be... explain it out please A.unchanged B.280 more C.280 less D.2970 more E.2970 less

math
if 8 men can do a job in days, what is the percentage increase in number of days required to do the job when 2 men are released? not just an answer please. A.16 2/3% B.25% C. 33 1/3% D.40% E.48%

math
there is 5 digits, you count wrong.

math
How many 5-digit even numbers can be made using the digits 2, 4, 6, 7, and 8, if digits cannot be repeated?

math
If digits cannot be repeated, how many four-digit numbers can be made using the digits 1, 3, 5,7, and 9 ?

math
The number of washers 3/32 inch thick that can be cut from a piece of stock 25 1/2 inches long, allowing 1/16 inch for waste for each cut is (A) 160 (B) 163 (C) 260 (D) 272 (E) 408 not just answer, please tell me how to do it

math
To obtain a final average of 80 % in a certain subject, what grade must a student earn in a test after having an average of 77.5 % in four examinations ?

math
Find the vertex angle of an isosceles triangle if it exceeds each base angle by 30 degree.

math
answer : 42

math
There were 100 pairs of socks 30% of them were sold on Monday and 40% of the remainder were sold on Tuesday. How many pairs of socks were left?

math
If 3 "A" cans can hold 4 "B" cans and 3 "B" cans hold 5 "C" cans than how many "A" cans are need to hold 20 "C" cans ?

math
The area of a triangle is 80 square meters and the base measures 20 meters. Find the number of meters in the measure of the altitude.

math
thank you

math
The supplement of an angle measures 11 times its complement. Then the measure of the angle is: (A) 9 degree (B) 99 degree (C) 81 degree (D) 90 degree (E) none of these not just answer, please tell me how to do it

math
Phil has 20 coins, nickels,dimes, and quarters, totaling $2.30. If he has twice as many nickels as quarters, how many quarters does Phil have?

math
The length of a rectangle is three times the length of a side of a square and the width of the rectangle is two less than the side of the square. If the perimeter of the rectangle is twenty eight more than the perimeter of the square, find the length of a side of the square. [...

math
The longer leg of a right triangle is 3 more than the shorter leg. The Hypotenuse is 6 more than the shorter leg. If the perimeter of the triangle is 36, find the length of each side of the right triangle. [ Only an algebraic solution will be accepted ] not just the answer , p...

math
Number of cubic inches in volume of cube, Number of square inches in surface area of cube. which one is greater or equal?

math
(1/2)X - (1/2)Y = 4 1. Slove for X 2. Slove for Y not just an answer please

math
If shipping charges to certain point 62 cents for the first five ounces and 8 cents for each additional ounce, the weight of a package, in pounds, for which the charges are $1.66 is not just an answer please A.7/8 B.1 C.1 1/8 D.1 1/4 E.1 1/2

math
One wheel has a diameter of 30 inches and a second wheel has a diameter of 20 inches. The first wheel traveled a certain distance in 240 revolutions. In how many revolutions did the second wheel travel the same distance? not just an answer please A.120 B.160 C.360 D.420 E.480

math
In a 3 hour examination of 350 questions, there are 50 mathematics problems. If twice as much time should be allowed for each problem as for each of the other questions, how many minutes should be spent on the mathematical problems? not just and answer please A.45 B.52 C.60 D....

math
thank you

math
If a circle had a circumference of 8.4 cm, what is the diameter of the circle to the nearest 0.1 cm?

math
A storage shed is in the shape of a square. A builder increases the length of one side of the shed by three feet and decreases the length of an adjacent side by two feet. The shed is now a rectangle with a perimeter of 70 feet. What is the measure of a side of the original she...

math
The length of a side of a square is fifteen less than four times the length of a side of a second square. The perimeter of the two squares differ by 24 inches. Find in inches, the length of a side of the smaller square. [ Only an algebraic solution will be accepted ]

math
The base of an isosceles triangle is four less than the sum of the lengths of the legs. If the perimeter of the triangle is 44, find the length of the three sides of the triangle.[ Only an algebraic solution will be accepted ]

math
The dimensions of a piece of fabric are 45" by 75". Find the area of the largest square that can be cut from this piece of fabric.

math
32x^3y^2z^4 / 4x^4yz^6 =

math
may be the question is wrong, forget it.

math
There is no typo, that how the question is

math
Jo saw a dress regularly priced at 78%. It was on sale at a discount of 30%. Find the amount of discount and the sale price.

math
What percent of the total number of states does each of the 50 states represent?

math
Use exponents to express the volume of a cube with edges of length 3y.

math
y = -(1/3)x

math
If k = 3x, and y -1/3x, then k time y would equal

math
If y = ( x-1)^2, then y 3/4 =

math
If k = p/4, for which of the following values of p does k equal 3 ?

math
Let [ x ] denote the greatest integer less than or equal to x. For example, [ 3.4 ] = 3 and [ -1 ] = -1. What is the value of [ -2.3 ] + [ 2.3 ]?

math
2( a + b ) x 4 1/2 (a + b ) =

math
If # is a binary operation defined by a # b = maximum of { a, b } or a max b, find the value of 5 # 3.?

math
If a * b is a binary operation defined as a + b / a , evaluate 2 * 4.

math
If the operation * is defined as a * b = 3a + b, find the value of 3 * 5.

math
If # is a binary operation defied by a # b = a^2 + b, find the value of 4 # 1.

math
If # is a binay operation defied by a # b = a^2 + b, find the value of 4 # 1.

math
Ten minutes after a plane leaves the airport, it is reported that the plane is 80 miles away. What is the average speed of the plane, in miles per hour?

math
A boy travels on his bicycle at the rate of 6 miles per hour and his sister on hers at the rate of 5 miles per hour. They start at the same time and place and travel over the same road in the same direction. After traveling for 3 hours, the boy turns back. How far from the sta...

math.
Mr. B walks for 4 hours at the rate of y miles an hour. He stops an hour for lunch and then returns to the starting point by a route that is twice as long, but he travels in an auto whose speed is five times that of his walking rate. Find the number of hours spent on the entir...

math
Padding 7 miles upstream, Steven and his brother averaged 2 miles per hour. On the way back, their rate of speed was 3 1/2 miles per hour. How long did it take them to make the round trip?

math
Two cars begin driving toward each other from towns that are 150 miles apart. The first car is traveling 45 miles per hour, and the second is traveling 55 miles per hour. If each leaves at 2:15 pm, when will the two cars pass on the road?

math
A commuter train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?

math
3 miles in 3/4 an hour mean 3/4 is 45 minutes so 15 minutes is 1 mile , and then 1 hour is 4 miles can i just use 3/0.75 = 4 miles

math
Matt walked 3 miles in 3/4 of an hour. At what rate of speed did he walk in miles per hour?

math
It takes 1 and 3/4 hours to fill a new underground gasoline storage tank. What part of the tank would be fill if the gasoline had been shut off after 1 hour?

math
Mary can clean the house in 6 hours. Her younger sister Ruth can do the same job in 9 hours. In how many hours can they do the job if they work together?

math
It takes 1 and 3/4 hours to fill a new underground gasoline storage tank. What part of the tank would be fill if the gasoline had been shut off after 1 hours?

Math
A plane leaves point A and flies S80° E to point B400 km away. How far east of A is B (to the nearest kilometer)?

life orientation
nuclear waste,causes radiation personning,cancer and all severe eases can result in death

Finance
A Treasury note with a maturity of four years carries a nominal rate of interest of 10 percent. In contrast, an eight-year Treasury bond has a yield of 8 percent. a. If inflation is expected to average 7 percent over the first four years, what is the expected real rate of inte...

chemistry
Calculate the pH of an Aqueous 3.8 x 10^-5 M solution of barium hydroxide. I need help.

healthcare management
The individual or group that will be communicating inside and outside the organization during this crisis situatiOn

AlgebraII
Choose the equation that best represents an ellipse for the given foci and co-vertices. Foci (+/-3,0) Co vertices (0, +/-6)

Physics
Where is the answer?

physics
2000

Math
Given that cos 13pi/18=sin y, first express 13pi/18 as a sum of pi/2 and an angle, and then apply a trigonometric identitiy to determine the measure of angle y.

Earth Science
Were there any lessons learned from the Valdez Spill that helped contain the devastation of the BP spill in the gulf?

Math
a bank of 16 floodlights together use 5600 watts of power how much power is used by each bulb

english
I think that the points of view make the story seem believeable

Calculus
There are two neighboring points P and Q on the curve f(x)=x^2 (a) Determine m(h), the slope of the straight line PQ (b) The slope, S, of the tangent at P is defined as S=lim h->0 m(h). Find the value of S. (c) Use this value of S to show that the equation of the tangent at...

algebra
The Total Net Yardage is___ yards. ???? would the answer be -3.

algebra
On three consecutive passes, a football team gains 5 yards, loses 21 yards, and gains 13 yards. What number represents the total net yardage?

language
Is the word tower a predicate

language arts
my mom went to the grocery store. she forgot her purse... a)comma B)and c)or d)but e)because

physical
A battery of e.m.f 24v and internal resistance of 4ohms is connected to a resistor of 3ohms.what is the terminal potential difference of the battery

math
Angle at a point=360 degree. So to convert 7/25 to degree.it wil be= 7/25*360= 7*360/25= 2520degree/25=100.8degree

physics
3m

Pen Foster Child Care
can someone help me with these question

Pen Foster Child Care
can someone help me with these question

Calculus
Use mathematical induction to prove that each proposition is valid for all positive integral values of n. 5^n + 3 is divisible by 4.

high school
not sure how to do this problem. I need help 3*2+5/9

4th grade
how do I use sentences comparing Strong, stronger and strongest? what is the difference between those words?

Pre-Calculus
I didn't get A = 7.85 degs... I got 61.8deg for A this time... which would make C have 64.2deg which still doesn't make sense...

Pre-Calculus
Solve the triangle. Round to the nearest tenth. B=54deg a=42 c=6.5 1. I found length of b using law of cosine and got 36.2 2. Using side of b, I used the law of sine to get angle A = 28.2 3. I added B+A and subtracted from 180 to get angle C = 127.8 which DOES NOT make sense s...

Pre-Calculus
Find the area of the triangle. Round to the nearest tenth. B= 42.8° a= 12.7 c= 5.8 I found b by using the Pythagorean theorem and got b= 11.298 but I don't know what to do next after this. I would find the altitude but I don't know angles A and C?

Algebra
(-6+b)^2

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