Thursday

July 31, 2014

July 31, 2014

Total # Posts: 131

**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?

**math**

3x-14.62

**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?