# melinda

Popular questions and responses by melinda-
## Chemistry

write isotpoic symbols of the form X-A (for example, C-13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer? The symbol is easy to figure out.** a) the iodine isotope with 74 neutrons B) the

*asked on February 8, 2007* -
## Precalculus

Determine the exact value of cos 465 degrees a) √3 + √2/2 b) √2 + √3√2/4 c)√2 - √3√2/4 d)2+√2-√3√2/4

*asked on January 29, 2012* -
## physics

A uniform thin wire is bent into a semicircle of radius r. Determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the "full" circle. Because wire is uniform x (sub cm) = 0 mass=dm length=dl coordinates

*asked on March 23, 2016* -
## Calculus

An object is dropped from the observation deck of the Skylon Tower in Niagara Falls, Ontario. The distance, in metres, from the deck at t seconds is given by d(t)=4.9t^2 a) the height of the observation deck is 146.9 m. How fast is the object moving when

*asked on March 14, 2012* -
## geometry

Express the following as a function of a single angle sin 20 degree cos 30 degree + cos 20 degree sin 30 degree

*asked on January 22, 2012* -
## Math

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

*asked on December 9, 2011* -
## Math

You are baking chocolate chip cookies. One batch makes 4 dozen big cookies. The recipe calls for 3/4 cup brown sugar. How many cups of brown sugar would you need if you wanted to make 11 dozen cookies.

*asked on September 9, 2019* -
## •teaching in early chldhood programs

Which of the following is a correct statement about exploratory play? A. In exploratory play, children assume primary responsibility. B. In exploratory play, who assumes responsibility depends on which learning center the activity is set up in. C. In

*asked on August 23, 2014* -
## ◦teaching in early chldhood programs

Which of the following is an example of an appropriate activity-plan objective? A. The child puts the story characters in sequence on the flannel board. B. The child feels good about his or her participation in the activity. C. Children think about seeds

*asked on August 23, 2014* -
## math

An open-topped box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of

*asked on December 15, 2011* -
## chemistry

Na3PO4(aq) and AgNO3(aq). Write the ionic equation.

*asked on November 4, 2013* -
## Chem

A sample of an unknown biochemical compound is found to have a percent composition of 55.03 percent carbon, 5.54 percent hydrogen, 32.10 percent nitrogen and the balance oxygen. What is the simplest formula for this compound ? How do I do this?

*asked on October 4, 2012* -
## Calculus and vectors

A parallelogram is formed by R^3 by the vectors PA=(3,2,-3) and PB=(4,1,5). The point P=(0,2,3). a) what are the location of the vertices? b) what are the vectors representing the diagonals? c) what are the length of the diagonals?

*asked on March 23, 2012* -
## Chemistry

At 20 C (approximately room temperature) the average velocity of N2 molecules in air is 1050 mph. What is the velocity of a molecule of N2? What is the kinetic energy of a N2 molecule with this velocity? What is the kinetic energy of a mole of N2? I know

*asked on March 13, 2011* -
## science

could you please help me how do you write a acrostic poem for bacteria.

*asked on October 24, 2008* -
## physics

A uniform thin wire is bent into a semicircle of radius r. Determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the "full" circle. Because wire is uniform x (sub cm) = 0 mass=dm length=dl coordinates

*asked on March 23, 2016* -
## Math

in a rectangle the measures of the base and the altitude are in a ratio of 1:4. I f the rectangle is equal in area to a square with a perimeter of 60 feet, find the dimensions of the rectangle HELP PLEASE TYSM!!

*asked on October 7, 2014* -
## teaching in early chldhood programs

Which of the following is an example of an appropriate activity-plan objective? A. The child puts the story characters in sequence on the flannel board. B. The child feels good about his or her participation in the activity. C. Children think about seeds

*asked on August 23, 2014* -
## •teaching in early chldhood programs

When assessing the overall layout of a classroom, what two factors should be so clear that children's movement behavior will be directly influenced? A. The amount of child-accessible storage and the presence of children's art materials B. The location of

*asked on August 23, 2014* -
## Physics

The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub.

*asked on April 15, 2014* -
## Finance

Stephenson Real Estate Capitalization

*asked on November 28, 2012* -
## staticstics

The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is taken, what is the probability that their average lenght differs from the mean by more than 2.0 meters

*asked on October 17, 2012* -
## Calculus and vectors

Please help/verify the answer. 1. When you add vectors geometrically: a) vectors are aligned tail to tail b) vectors are aligned head to head c) vectors are aligned head to tail d) vectors are put side by side Is the answer D?

*asked on March 26, 2012* -
## Calculus-help~

A certain fast food restaurant wants to determine the increase in revenue per cheeseburger if sales are $45,000. Let the function [p=(120000-x)/(30000)] represent the price of x cheeseburgers.

*asked on March 7, 2012* -
## Precalculus

1. What two common identities are most useful for simplifying 2tanx/(sin^2x + cos^2x - tan^2x)? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

*asked on January 29, 2012* -
## Math

Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand

*asked on January 19, 2012* -
## Precalculus

Verify these answers 1.Which of the six trigonometric functions are positive in quadrant III? Answer: tangent and cotangent -------------------------------------- 2. What is the amplitude of the function y = pi/2 sin(6/3t - pi/6) + 14? Amplitude: pi/2

*asked on January 18, 2012* -
## geometry

find the value of following sin(cos^-1 12/13) give your answer as a fraction

*asked on January 11, 2012* -
## Precalculus

Can someone help me with this question? I got the transformation for horizontal shift and vertical shift, however, I don't know how to find the vertical/horizontal compression/stretch. 1. Describe the transformations that were applied to the parent

*asked on December 10, 2011* -
## precalculus

Can someone verify if my answer is right? 1. Which function has a negative average rate of change on the interval 1

*asked on December 3, 2011* -
## Alliedhealth

A woman is brought into an emergency room after a severe automobile accident. She’s unconscious and badly injured. Her husband arrives at the emergency room at the same time as she arrives in the ambulance. The doctor explains the wife’s condition to

*asked on January 24, 2011* -
## Math (triangles)

Given b=48, A=36 degrees find the remaining parts of the right triangle. a= a)51 b)35 c)66 d)29 and c= a)35 b)26 c)82 d)59 This one I'm lost on! a = b tan A = 34.8 (round it off to 35) c = b/cos A = 59.3 (round it off to 59)

*asked on March 9, 2007* -
## Physics

a uniform thin wire is bent into a semicircle of radius r, determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the full circle

*asked on March 23, 2016* -
## math

In a Garden one fourth of the plants are peppers of the pepper plants one-third are yellow peppers what fraction of the plants are yellow peppers

*asked on March 9, 2016* -
## Basic Geometry

What does ' mean? ie. triangle abc is congruent to triangle a'b'c'

*asked on October 20, 2014* -
## Algebra

If 6 is a root of the equation x^2-8x+k=0, find the value of k.

*asked on September 11, 2014* -
## Algebra

3x^2+5x=x^2 please help me solve for x.

*asked on September 8, 2014* -
## teaching in early chldhood programs

Which of the following is a common mistake new teachers make when setting up learning centers? A. Planning specific activities for blocks or dramatic play B. Introducing the centers to children so they know how to use them C. Allowing the children to

*asked on August 23, 2014* -
## teaching in early chldhood programs

A teacher is concerned about monitoring the progress of individual children in the second-grade classroom. What would be the best advice to give the teacher? A. Give a test periodically to see if the children have achieved according to the standards set.

*asked on August 23, 2014* -
## Physics please help?????

The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub.

*asked on April 16, 2014* -
## What is a biology lab practical?

Is it a test on paper or can I look at notes and answer questions? Do I have to dissect something, have the TA ask me a question and answer instead of dissecting as a group? I've just been quizzing myself on parts of the animal in case we can't use notes,

*asked on April 8, 2014* -
## science

a 60.0kg boy runs up the stairs of a football stadium to a height of 12m above the ground 15s.what are the work and power student has done

*asked on April 10, 2013* -
## algebra 1 part 2

What are the minimum, first quartile, median, third quartile, and maximum of the data set? As cars passed a checkpoint, the following speeds were clocked and recorded. Speed (mph): 55 62 61 54 68 72 59 61 70

*asked on April 1, 2013* -
## algebra

y = 5x, solve for x

*asked on November 15, 2012* -
## Economics

How do I write a paper on "Why we trade with Brazil?"

*asked on October 17, 2012* -
## staticstics

The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is taken, what is the probability that their average lenght differs from the mean by more than 2.0 meters

*asked on October 17, 2012* -
## algebra

5A=5-b 5A=3-b

*asked on October 14, 2012* -
## Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

*asked on October 10, 2012* -
## Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

*asked on October 10, 2012* -
## Chemistry

Write the molecular equation for the combination of aqueous solutions of sodium chloride and silver nitrate. Enter your answer as the sum of all coefficients.

*asked on October 10, 2012* -
## Algebra

-214 / 2

*asked on October 1, 2012* -
## Algebra

(-36)/(-2) =

*asked on September 30, 2012* -
## math

solve the problem 456 + 65.

*asked on September 11, 2012* -
## math

subtract 345 from 678

*asked on September 11, 2012* -
## math

At Thanksgiving dinner, Deborah ate a portion of turkey (673 calories;masch potatoes (408 calories);stuffing (519 calories); cranberry sauce (219 calories);beans (278 calories); and pumpkin pie (523 calories); approximately how many calories did she

*asked on September 11, 2012* -
## math

randall opened a savings account on June 1st and made the following deposits: $212.19, June 5th $23.03, June 12 $307.15, June 19th $652.00 and June 30, $78.75. Assuming he made no withdrawals, approximately how much did he have in the savings account at

*asked on September 11, 2012* -
## math

round off 16,352 to the nearest tens

*asked on September 11, 2012* -
## earth

how long will it take Uranium-238 for there to ne 25% of the original radioactive period to be left? i need this question answered ASAP!!!!!(:

*asked on September 6, 2012* -
## Biology

how many properties of blood exists

*asked on April 25, 2012* -
## Calculus and vectors

Do the vectors (2,0,1),(-2,0,0) and (2,3,0) lie on the same plane? Explain your reasoning.

*asked on March 26, 2012* -
## Calculus

Vector C=5 and Vector D=8. The angle formed by C and D is 35 degrees, and the angle formed by A and C is 40 degrees. Determine |B|. Here is the image for triangle: imgur dot com/OZAwV please help, I have a test tomorrow~

*asked on March 26, 2012* -
## Calculus

If a(0,-1,3)+b(1,1,1)-c(1,2,5)=(-2,3,-8), determine a,b,c Is this the correct answer: a= -4, b= -3, c= -1?

*asked on March 25, 2012* -
## Calculus

If a(0,-1,3)+b(1,1,1)-c(1,2,5)=(-2,3,-8), determine a,b,c

*asked on March 23, 2012* -
## Calculus & Vectors

Could someone explain this question to me? I attempted the question and here is why I chose the answer below. Thank you! -------------------------------------- 1. If A ⃗ is a vector representing 50 km/h northeast, what is 3/5 A ⃗? a) 30 km/h southwest

*asked on March 17, 2012* -
## Calculus

Which of the following is the maximum value of the function f(x)=2sinxcosx? a) 0 b) 1 c) 2 d) No maximum value

*asked on March 8, 2012* -
## Calculus-derivatives

Determine the derivative for y=tanxcosx a) y'=-sinxtanx + cosxsec^2x b) y'=-sinxtanx + cosxtanx c) y'=cosxsec^2x d) y'=sinx - cosxsec^2x

*asked on March 8, 2012* -
## Calculus

Determine the slope of the tangent to the function f(x)=5xe^x at the point with x-coordinate x=2 a) -1/5 b) 10e^2 c) 15e^2 d) -5e^2

*asked on March 6, 2012* -
## Calculus-concave up and down

Can someone explain this question to me? What intervals should I use to test whether or not the graph is concave up or down. Here is the URL for the graph. imgur dotcom/FdQCV

*asked on March 1, 2012* -
## Calculus-derivatives

f(x) = (x-1)^(2/3)*(x+3) What are the critical numbers? the derivative would be =2/3(x-1)^(-1/3)(x+3) + (x-1)^2/3 What do I do next?

*asked on February 29, 2012* -
## Calculus

Simplify difference quotients. 1/(1+h)-1/h I got 1-1-h/h but the answer is -1/(1+h)

*asked on February 7, 2012* -
## Precalculus-Verify

log(base2)x-log(base2)6= log(base2)5+ 2log(base2)3 log(x/6)=3log15 (x/6)=15^3 6*(x/6)=15^3*6 x=15^3*6 =20,250 Answer is 270.... What did I do wrong...

*asked on January 30, 2012* -
## Precalculus

What are the restrictions on the variable in the equation log(3x-5)-log(x-2)=log(x^2-5)? 5/3, 2, ???

*asked on January 30, 2012* -
## Precalculus

What am I doing wrong? I keep getting 48 and its wrong... Solve 2log(x)-log(4)=3log(4) 2log(x)-log(4) log(x/4)=3log4 log(x/4)=log12 x=48

*asked on January 30, 2012* -
## Precalculus

Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

*asked on January 30, 2012* -
## Precalculus

Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

*asked on January 29, 2012* -
## Precalculus

Verify these answers please. 1. Which of the following functions would f(x) = log(base 10)x horizontally 4 units to the left? a) f(x)=log(base10)(x-4) b) f(x)=4Log(base10)X c) f(x)=log(base10) x+4 Answer: C ------------------------------------ 2. State the

*asked on January 29, 2012* -
## Precalculus

What two common identities are most useful for simplifying 2tanx/sin^2x + cos^2x - tan^2x? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

*asked on January 29, 2012* -
## Precalculus

Explain how to do these please. 1. solve x=log(base2)*1/8 by rewriting in exponential form. 2. Solve log(3x+1)=5 3. Solve log(base x)8=-1/2

*asked on January 29, 2012* -
## Trig

If a plane takes off on runway 31 (N 31o W) and flies 4 miles, then makes a right (90o) turn and flies 11 miles, what bearing will the traffic controller use to locate the plane?

*asked on January 24, 2012* -
## Math

The number of library books in a school increased by 20% after it bought new books in may. The number increased by another 20% after a bookstore donated 300 books in June. Find the number of books in the library before it bought new books in May.

*asked on January 24, 2012* -
## Math

Would someone like to help me with these questions? Steps appreciated~ 1. If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire roll in 1 minute? -------------------------------------- 2. At t=0 a

*asked on January 19, 2012* -
## Math

How does tanθ look like in a graph? What would it be their y values?

*asked on January 16, 2012* -
## Math

How to setup this equation? Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder. a) Find the average

*asked on January 15, 2012* -
## Precalculus

How do you setup the equation for this? Thanky ou! Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder.

*asked on January 12, 2012* -
## Precalculus

Can someone help me with this question (It's a graph) imgur dot com/r16ba One of the answers would be: x= 2 not x=-2 (If you think its an unsafe website, type in google "Imgur," it'll show you that its a site to post images)

*asked on January 12, 2012* -
## Precalculus

Can someone help me with this question (It's a graph) imgur dot com/r16ba One of the answers would be: x= 2 not x=-2

*asked on January 11, 2012* -
## geometry

find the value of following sin(cos^-1 12/13) give your answer as a fraction

*asked on January 11, 2012* -
## Math

I have no clue what to do on these questions. 1.Two resistors a and b are connected in parallel. The total resistance R in such a circuit is found by formula R= 1/a + 1/b. If R=5/6 ohms and b is one more ohm than a, find the number of ohms in a and b. 2.

*asked on January 10, 2012* -
## Precalculus-helpp

Verify if my answers are correct. 1. The function y=x^3 has undergone the following sets of transformations. If y=x^3 passes through the points (1,1), (3,27) and (4,64), list the coordinates of these transformed points on each new curve. a) reflected in

*asked on December 11, 2011* -
## Precalculus

Verify if my answers are correct. 1. The function y=x^3 has undergone the following sets of transformations. If y=x^3 passes through the points (1,1), (3,27) and (4,64), list the coordinates of these transformed points on each new curve. a) reflected in

*asked on December 11, 2011* -
## Precalculus

Whats the value of a? =-= For the graph, determine the equation of the function in the form y=a(x-h)^2+k. Then describe the transformations that were applied to y=x^2 to obtain the graph. Here is the graph: imgur dot com/A7e5M The only thing I know is

*asked on December 11, 2011* -
## precalculus

How do I find the vertical/horizontal compression/stretch? For the graph, determine the equation of the function in the form y=a(x-h)^2+k. Then describe the transformations that were applied to y=x^2 to obtain the graph. Here is the graph: imgur dot

*asked on December 10, 2011* -
## precalculus

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

*asked on December 9, 2011* -
## precalculus

Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary. y=-6(x+7)^4 + 5 0=-6(x+7)^4 + 5 -5=6(x+7)^4 -5/6 =(x+7)^4 There are no x-intercepts??

*asked on December 9, 2011* -
## Math

I need help with this question, it says to find the instantaneous rate at distance t = 6s with the given graph First of all, it is a linear line, do i need to find the equation of the graph? After finding the equation, i plug in 5.99 and 6.01? and solve ?

*asked on December 4, 2011* -
## Math

Someone verify if this is correct, please! 1. Draw a distance versus time graph that corresponds to the walk described below. Adam starts 8 m away from the motion sensor and walks in a straight line toward the sensor at a constant rate of 0.5 m/s for 3 s.

*asked on December 4, 2011* -
## precalculus

How do you do this question? 1. A speed versus time graph shows the segment from (3, 4) to (8,4). The units for the vertical axis are m/s. If the object whose speed was being graphed is 8 m away from the point from which measurements are made at t= 3s, how

*asked on December 3, 2011* -
## algerbra2

find the eighth term of a sequence whose first three term are 13,6,-1

*asked on November 21, 2011* -
## algebra

how do you do this problem? perform indicated operation write answer as a fraction, simplify. 1/11+ 5/6

*asked on November 18, 2011* -
## English

We're studying a Dickinson poem Wild Nights-- I have a question Wild Nights--Wild Night! Were I with thee 1. Is that an example of an internal rhyme, slant rhyme, alliteration or caesura? 2. The poem has two stanzas that are ABBA and then two ABCB and ABCB

*asked on October 12, 2011*

## Pages

**1**- 2