Tuesday
July 22, 2014

Posts by Leah


Total # Posts: 360

college chem
You are instructed to create 400. mL of a 0.40 M phosphate buffer with a pH of 6.9. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l) equilibrium reaction arrow H3...

Physics
a 40kg girl and a 30kg boy face each other on friction free roller skates. the boy pushes the girl,

chemistry
The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) ΔH° = -2220 kJ How much&n...

MATHHH
You are literally a life saver, thank you so so so so so so much!!

MATHHH
A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?

MATHHH
A conveyor belt sushi restaurant lets you choose what you want to eat from variously-coloured plates that go by. You pay based on the colours of the plates. After dinner, 1 green plate, 4 yellow plates, and 2 blue plates. Use the Fundamental Counting Principle to count how man...

MATHHH
A paper bag contains a mixture of three types of treats: 12 granola bars, 10 fruit bars, and 8 cheese strips. Suppose that you play a game in which a treat is randomly taken from the bag and replaced, and then a second treat is drawn from the bag. You are allowed to keep the s...

Math 12
In Lotto 649, find the probability that: a) You have all six correct numbers. b) You have three correct numbers.

Math 12
A bag contains 5 red, 3 green, and 6 marbles. If a child grabs three marbles, find P(at least 2 blue marbles).

Math 12
Wait, how'd you get 33320 in A?

Math 12
Ohhhhhhh! okay, thank you! :)

Math 12
is C for nCr???? i'm a little confused

Math 12
Five cards are dealt from a shuffled deck of 52. Find the probability that: a) The hand has 3 spades and 2 hearts. b) The hand has 2 aces, 2 kings, and one other card.

Math 12
Thank you!!!!!!!

Math 12
One hundred tickets are sold for a raffle. Three prizes are awarded. What is the probability that Andy wins first prize, Brianna wins second, and Cam wins third? What is the probability that Andy, Brianna, and Cam are the three winners (not necessarily in that order)?

BIOLOGY 12
Explain the path of deoxygenated blood from the right atrium to the lungs

Math
6

chemistry
The pressure in an automobile tire is 1.85 atm at 27.0°C. What will be the pressure if the temperature increases to 38.0°C?

Math
A company replaces their cars every 6 years. A car is worth $13520 after 2 years. The company uses a depreciation rate of 35% a year. a) How much will the car be worth when the company replaces it? b) How much did the car cost when it was purchased?

Foundations Math 12
Mark wants to buy a car in 15 months, when he graduates. He estimates the car he wants will cost $12 500. Mark has just invested $7500 in a GIC earning 4% compounded quarterly. He also has a savings account that earns 2.45%, compounded monthly. How much should he deposit in hi...

Foundations Math 12
Thanks Steve!!!

Foundations Math 12
48 weeks ago, Gabriella invested at 3.9% interest, compounded weekly. Today, her investment is worth $225.50. How much interest has Gabriella's account earned in the past 48 weeks?

Foundations Math 12
thank you so much! :)

Foundations Math 12
Jie is investing $15000 and is choosing between two options. With Option A, the investment is compounded semi-annually and will grow to $20000 in 5 years. With Option B, the investment is compounded monthly for 5 years. The annual rate of interest is the same in both options. ...

Foundations Math 12
Forty eight weeks ago, Gabriella invested money at 3.9% interest, compounded weekly. Today, her investment is worth $225.50. How much interest has Gabriella's account earned in the past 48 weeks?

Foundations Math 12
Thank you!

Foundations Math 12
Bathsheba is saving up for the down payment on a farm. She invests $30000 at 5.2% interest, compounded quarterly, for 4 years. To the nearest tenth of a percent, Bathsheba's rate of return will be ____%.

Foundations Math 12
Thanks Henry!

Foundations Math 12
Kelly is planning to renovate her house. She intends to spend $200000. She invests $150000 in an account at 5.3% interest, compounded monthly. It will take Kelly ____ years to meet her goal, to the nearest tenth of a year.

Foundations Math 12
Determine the term of a $46000 investment with an interest rate of 3.9%, compounded monthly, if the future value is $100000. Round your answer to the nearest year. - I know I use the rule of 72 but what do you do after that?

math
9

math
If a gardener has 2.625 pounds of soil and divides it into bags with equal amounts, how much soil would be in each bag?

Math
Ahhhh, okay I see what to do now. Thank you, Ms.Sue!

Math
An appliance is on sale at 30% discount. If the sale price is $42.00, what was the original price of the appliance?

Math
What would the equation look like when the line is parallel to x-y+1=0 and has a Y-intercept of 3/4

Math
What would the equation look like when the line is parallel to x=3y-2 and has a Y-intercept of -3/2

Math
What would the equation look like when the line is parallel to 2x-3y=1 and has a Y-intercept of 0

Math
What would the equation look like when the line is parallel to y= -x+1/2 and has a Y-intercept of -2

Math
What would the equation look like when the line is parallel to y= 3/4x-3 and has a Y-intercept of 3

Math
What would the equation look like when the line is parallel to y=-2x+3 and has a Y-intercept of -1

Math
What would the equation look like when the line is perpendicular to 2x-3=4y and has Y- intercept of -5/4

Math
What would the equation look like when the line is perpendicular to 2x-3y+1=0 and has Y- intercept of 2/3

Math
What would the equation look like when the line is perpendicular to x+2y=10 and has a y-intercept of -10

Math
What is the equation look like when the line is perpendicular to y= 4-3x and has y intercept of 3/4?

Math
What would the equation look like if the line is perpendicular to y=x+2 and has a y-intercept of 0?

Algebra
How did you .1x? and where did the 3600 come from?

Algebra
Show all steps and Find the maximum revenue for the revenue function R(x)= 360x - 0.05x^2

Math
Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 6.The price for x pounds of cheese at $6.99 per pound (LINEAR FUNCTION) 7. A car accelerating on the highway to reach a speed of 62 mph then slowing dow...

Math
Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 1. Jova walks quickly for 25 minutes then she rests for 5 minutes before continuing on for another 10 minutes. (NOT A LINEAR FUNCTION) 2 A rock that is ...

Math
Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 6.The price for x pounds of cheese at $6.99 per pound (LINEAR FUNCTION) 7. A car accelerating on the highway to reach a speed of 62 mph then slowing dow...

Math
Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 1. Jova walks quickly for 25 minutes then she rests for 5 minutes before continuing on for another 10 minutes. (NOT A LINEAR FUNCTION) 2 A rock that is ...

pritchett
what does D.A.R mean in S.S need to know ASAP

English
Which Anology would go best with this one? Pond:lake:: A. man:child B. water:sream C. lake:sea D. dusk:night

English
Which analogy would best go with this one? branch:tree:: A. flower:garden B. teo:three C. tentacle:octopus D. near:far

math
Sally and Marta had the same number of postcards. After Sally sold 18 of her postcards, Marta had 4 times as many postcards as Sally. How many postcards did each girl have to begin with?

Math
How would you solve this word problem in one variable inequality form? One cell phone company offers a plan that costs $29.99 and includes unlimited night and weekend minutes. Another company offers a plan that costs $19.99 and charges 35 cents per minute during nights weekend...

accounting
A recent cash budget showed estimated cash receipts of $159,000, estimated cash disbursements of $155,000, and a desired ending cash balance of $6,000, with no borrowing of funds. The beginning cash balance was:

physics
7.42m

Math
How much is $20,000 compounded annually at 6% for 35 years? Thank you. Please show solution

Math-Hooke's law
Using Hooke's Law (F=kx) determine: A) A weight of 5 pounds stretches a certain spring from its natural length of 10.2 inches to a length of 10.5 inches. Find K. B) What weight will stretch the spring in part (A) to a length of 13.2 inches? Thank you!

Statistics
There were two independent groups who took a school course by different modes. The first sample of students took the course in the online and the second sample took the course in the conventional face to face mode. Using the sample data determine if there is significant differ...

Physics
Suppose the block is released from rest with the spring compressed 5.50 cm. The mass of the block is 1.60 kg and the force constant of the spring is 965 N/m . Assume the surface is frictionless. A) What is the speed of the block when the spring expands to a compression of only...

D/dt
Thank you for the equation and the useful article. :) So this is what I get. f(t) dt= 2(0)- [sqrt(t^2+1) * 2t] f(t) dt= -sqrt(t^2+1) *2t Is this correct? Thank you so much. :-)

D/dt
Calculate d/dt when a=t^2, b=2 and sqrt(x+1)dx. My answer turns out to be incorrect despite my checking it several times. I got -2/3t* sqrt(t^2+1) Can someone explain to me what is wrong with my answer and how to go about obtaining it the right way? Thank you everyone. :-)

Language Arts
Which sentence below has a missing antecedent? A Many people are planning to attend the race, so we should get to the park early. B My parents are both swimmers, so I know a lot about it. C When Steven and Patrick went to the movies, he bought the tickets. Is it B??

LIFE ORIENTATION
identify and describe 3 environmental health hazard that cause ill health within your community and include evidence that is current if the identified issues.use graphs ,statistics, pictures

Math
Stuart needed to purchase cleaning supplies for his company. He purchased 15 rolls of paper towels for $0.65 each, 15 bottles of cleaning solution for $1.25 each, 4 containers of garbage bags for $2.45 each and 3 new mops for $6.98 each. He received a 15% discount using his fr...

MATH
30

Chemistry
Figured it out, it is 11. :)

Chemistry
If the Kb of a weak base is 1.5 × 10^-6, what is the pH of a 0.25 M solution of this base? I found that I need to use the quadratic equation but I'm having difficulties because I come up with taking the square root by zero and that isn't right. Please help! a=1, ...

MATH
THE AREA OF A RECTANGUALR GARDEN IS 240 SQ FT. IF THE LENGTH OF THE GARDEN IS 20 FT.,WHAT IS ITS WIDTH?

MATH
THE AREA OF A RECTANGUALR GARDEN IS 240 SQ FT. IF THE LENGTH OF THE GARDEN IS 20 FT.,WHAT IS ITS WIDTH?

MATH
THE AREA OF A RECTANGUALR GARDEN IS 240 SQ FT. IF THE LENGTH OF THE GARDEN IS 20 FT.,WHAT IS ITS WIDTH?

MATH
THE AREA OF A RECTANGUALR GARDEN IS 240 SQ FT. IF THE LENGTH OF THE GARDEN IS 240 FT.,WHAT IS ITS WIDTH?

English
ok thank you!

English
Please help with this question that has been bothering me! I take bio college class and we have graduate/student assistant for labs & when taking an exam. The professor is never there during those sections.Due to my low exam results,I feel I'm not being graded on fairly be...

Trigonometry
Hi, I really need help in understanding how to solve trig equations. How do you solve this equation? Solve the equation on the interval 0 < or equal to x < or equal to 2pi. sinx = (square root of 3)/2 I appreciate your help. Thank you!

Physics
You are standing on top of a building that is 75-m high and you throw a 4-kg stone horizontally at a speed of 6.6-m/s. How far from the base of the building will the stone land? (the ground is flat)

Chemistry
Need help on a lab results write-up. The lab is the synthesis and analysis of a transition metal complex. General reaction was stated as: Fe(III) + x(acac) -> Fe(acac)x - we were to determine x by completing experiment. x = 1, 2, 3, 4... acac = 2, 4 pentanedione Procedure o...

Chemistry
what are the products when water,ferric chloride and ammonium thiocyanate are combined?

English
1. linking verb? 2. objective complement? 3. compound predicate nominative? 4. complete subject? 5. gerund phrase? 6. appositive phrase? 7. noun clause? 8. adverbial clause? 9. independent clause?

English
Identify the term that best describes the words/phrases in parentheses. 1. The teacher asked her pupils to (stay) put during the screening of the documentary. linking verb action verb 2. The committee judged the logo (the most appropriate symbol) for the association’s mis...

biology
how can u investigate sugars or starch in a banana

Math
John is using a pulley to lift the sail on his sailboat. The sail weighs 150 N, and he must lift it 4.0 m. a. How much work must be done on the sail? b. If the pulley is 50% efficient, how much work must John do on the rope to lift the sail?

Math
A river does 6,500 J of work on a water wheel every second. The wheel's efficiency is 12%. a. How much work in joules can the axle of the wheel do? b. What is the power output of the wheel in 1 s?

Physical Science
When you do 100 J of work on the handle of a bicycle pump, the pump does 40 J of work pushing the air into the tire. What is the efficiency of the pump?

Math 9
sorry i meant 2.07 m or 207 cm

Math 9
so the answer would be 2.07 m or cm

Math 9
Please help me on this question. Thanks! One pole measured 1.35m and the smaller pole measured 0.83m. They needed to be tied together. They were attached by overlapping the ends and tying them together. The length of the overlap was 12cm. What is the total length of the new po...

Ashford University
Evaluate the ways in which the legacy of slavery has prevented the United States from building a more just society, supporting your evaluation with the textbook and additional sources. Define what Dr. King’s refrain, “free at last,” looks like to you and how our...

earth Geology
This is just a question that I was curious about, why do mountain belts run parallel to coastlines? Thanks

Physics
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 5.4 m/s. A player cannot touch the ball until after it reaches its maximum height and begins to fall down. What is the minimum time that a player must wait before touching the ball? I ...

chemistry grade 11
A molecule of CHCl3 (chloroform), has the same shape as a molecule of carbon tetrahydride, CH4. But carbon tetrahydride’s boiling point is -164º C and chloroform’s boiling point is 62 ºC. Explain the difference between the boiling points of the two substanc...

English/help
Yesterday I posted three analogies, two I needed to know of they were correct, the other I was lost on, can someone take a look I have to go soon. Is the first one a comparison of Sandra and her fear to that of the kitten?

English
I am having trouble with finding the analogy in this one: sandra was sitting in the backyard avoiding the party. she jumped when she heard a noise but it was just a little gray ritten. he look even more scared of her and she was of him. He paused and then walk toward her slowl...

Math
Hi I am not good with math. Please tell me how to differentiate mixed numbers, order of operation,subtraction, divide and multiplication etc. Thanks!

health
what is intensity?

English 4
It's A.

English 4
Which of the following most distinguishes an epic from a mock epic? A. its subject matter B. its style C. its vocabulary D. its length I'm thinking its B.

Health
What physical symptoms often accompany social phobia? A. Difficulty talking B. Trembling C. Nausea D. All of the above help me please

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