Thursday
December 18, 2014

Posts by danielle


Total # Posts: 740

math
97
December 9, 2014

math
I am a number between 60 and a 100. My ones digit is 2 less than my tens digit. I am a prime number. What am I? Explain.
December 9, 2014

math
The factors of a number include 2, 3, 4, 6, 8, 12, 16, 32, and 48. Which could be the number?
December 9, 2014

math
Manny makes dinner using 1 box of pasta and 1 jar of sauce. If pasta is sold in pckages of 6 boxes and sauce is sold in packages of 3 jars, what is the least number of dinners that Manny can make without any supplies left over?
December 9, 2014

Child Development
What kind of teacher are you to say my answers are laughable?
December 8, 2014

Child Development
Please Check my answers 1. A type of communication that isn't only about the present and that promotes higher level thinking such as planning and reminiscing is called A. child-child conversation. B. chanting. C. early production. D. decontextualized talk. ANSWER: A 2. ...
December 8, 2014

Child Development
I corrected the other ones that were wrong can you please check them? Thank you:) 2) B 4) D 8) A 9) C 10) A 11) D
December 4, 2014

Child Development
Can you check these? 1a) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale.  B. time sampling. C. event sampling. D. checklist. ANSWER : B 2a) Which of the following can...
December 4, 2014

Child Development
2) C 4) D 8) A 9) C 10) A 11) D
December 4, 2014

Child Development
10) A?
December 4, 2014

Child Development
1) B 2) D 3) A 4) B 5) A 6) C 7) B 8) B 9) A 10) C 11) A 12) B
December 4, 2014

Child Development
Possibly
December 4, 2014

Child Development
1) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale. B. time sampling. C. event sampling. D. checklist. 2) One way a teacher can help a child stand up for her rights is A. making other ...
December 4, 2014

Chemistry
A 100.0 mL sample of a 0.200 molar aqueous solution of K2CrO4 was added to 100.0 mL of a 0.100 molar aqueous solution of BaCl2. The mixture was stirred and the precipitate was collected, dried carefully, and weighed. How many grams of precipitate should be obtained? The ...
December 1, 2014

Calc
Three students have ordered a 14 inch diameter pizza. They slice it with 2 parallel cuts, giving them 3 pieces with equal area. The two cuts are equidistant from the center of the pizza. Find the horizontal distance between one cut and the center of the pizza. I figured the ...
November 23, 2014

chem
How many mL of a 0.123 M aqueous solution of aluminum bromide, AlBr3, must be taken to obtain 7.77 grams of the salt?
November 18, 2014

college algebra
Suppose that the Russian population is declining by 0.48% each year, and continues to decline at this rate every year. a.) what is the overall 'growth' factor (really a decline factor) for 40 years of population decline? As a percentage of the current population, what ...
November 17, 2014

math- bc calc
a building is 36 ft tall. A pulley is attached to the top of the building. A rope is looped through the pulley. One end of the rope is attached to the lantern that hangs vertically parallel to the side of the building. The rope passes up vertically from the lantern, through ...
October 29, 2014

math
A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...
October 23, 2014

Salford
How to prepare 500ml of 7% Question 6 You need to make 500mls of a 7% bovine serum albumin solution. What mass, in grams, do you need to add? Perform the calculation then type in the correct answer to 1dp. Do not add units or additional spaces. 10 points
October 19, 2014

Physical Science
A box has a mass of 90 kg If the box is accelerating upward at 1.0m/s2, what is the tension of the cable?
October 14, 2014

com 200
All of the following are true of what typically occurs when first meeting someone EXCEPT:
October 7, 2014

Physics
A plane with a velocity of 111. 9 meters per second at a maximum rate of 6.8 m/s^2 the plane touches the runaway what's the minimum time before it can come to rest? A=6.8m/s^2 V=111.9m/s t=?
September 28, 2014

Math Homework
183.79
September 28, 2014

Chemistry
If you dilute 14.0mL of the stock solution to a final volume of 0.350L , what will be the concentration of the diluted solution? Before it, there was a question: How many milliliters of a stock solution of 5.60 M HNO3 would you have to use to prepare 0.190L of 0.450 M HNO3? ...
September 27, 2014

Chemistry
A professor orders 250 mL of house coffee at precisely 95°C. She then adds enough milk at 10°C to drop the temperature of the coffee to exactly 90° C. Calculate the amount of milk (in mL) the professor must add to reach this temperature. Assume that the coffee and ...
September 23, 2014

physics
A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle θ = 16.8° above the horizontal, and the landing ramp is identical to the takeoff ramp. The buses are parked side by side, and each bus is 2...
September 21, 2014

philosopy
Milton Friedman observes that if the same argument that advocates of corporate social responsibility say should be brought to corporate shareholders is instead brought before union members, the logical bankruptcy of the argument would be clearly evident because?
September 17, 2014

Physics
Bill throws a tennis ball vertically upward such that it leaves his hand with a speed of 12 m/s. Bill catches the ball at the same height from which he released it. Assume that air resistance is negligible, so the tennis ball can be considered to be in free-fall, with an ...
September 12, 2014

Chemistry
The level of water in a rectangular swimming pool needs to be lowered 4.00 inches. If the pool is 36.50 ft long and 15.00 ft wide, and the water is siphoned out at a rate of 5.0 gal/min, how long will the siphoning take? 1 ft^3 = 7.48 gal.
August 28, 2014

physics
A swimmer heads directly across a river, swimming at 1.5 m/s relative to the water. She arrives at a point 30 m downstream from the point directly across the river, which is 87 m wide. (c) In what direction should the swimmer head so as to arrive at the point directly opposite...
August 9, 2014

physics
AH! Sorry, I didn't know it would make the site look messy. I've been working on these for a while now,and I promise I just a lot of work into them. i didn't realize I had posted so many. Sorry.
August 9, 2014

physics
Two boat landings are 8.0 km apart on the same bank of a stream that flows at 2.8 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water?
August 9, 2014

physics
Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the collision ...
August 9, 2014

physics
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect any effects due to ...
August 9, 2014

physics
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect any effects due to ...
August 9, 2014

physics
A swimmer heads directly across a river, swimming at 1.5 m/s relative to the water. She arrives at a point 30 m downstream from the point directly across the river, which is 87 m wide.
August 9, 2014

physics
You are riding in a boat whose speed relative to the water is 7.4 m/s. The boat points at an angle of 24.8° upstream on a river flowing at 15.2 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 26.1 m wide.
August 9, 2014

American History
11. Which of the following is true of the Supreme Court's decision in Brown v. Board of Education of Topeka? A. It ruled that desegregation was a state issue, but that segregation was a federal issue. B. It established that all citizens should have access to public ...
July 25, 2014

algebra
Please help me solve this: If an object is projected upward with an initial velocity of 112 feet per second from a height h of 128 feet, then its height t seconds after it is projected is defined by the equation h=-16t^2 + 112t + 128. How many seconds after it is projected ...
July 14, 2014

trig
At a horizontal distance of 101 meters from the base of a tower, the angle of elevation to the top is 15 degrees. Find the line of sight distance to the nearest meter.
May 28, 2014

math
A 1.6 km road rises 400 m. What is the angle of elevation of the road to the nearest degree?
May 28, 2014

math problem
In DABC, what could the 7 shown in the ratio sin A = 7/9 represent? A) the length of the adjacent side of angle B B) the length of the opposite side of angle A C) the length of the hypotenuse of a right triangle D) the length of the adjacent side of angle A I did this as an ...
May 27, 2014

math
thank you
May 27, 2014

math
A ladder is leaning against the side of a house and forms an angle of 66o with the ground. The foot of the ladder is 11.3 feet from the base of the house. Find the length of the ladder to the nearest foot.
May 27, 2014

trig
thank you, I was confused
May 27, 2014

trig
A road has a 10% grade (slope). To the nearest degree what is the angle of elevation of the road? should I use sin?
May 27, 2014

trig
A 15 ft. ladder makes a 35o angle with the side of a house. To the nearest tenth of a foot how high up on the house does the ladder come?
May 27, 2014

math
The Washington Monument is 169 meters high. Find the angle of elevation to the nearest degree to the top of the monumenmt from a point .5 km from the base.
May 25, 2014

need help1 what function to use? math
thank you
May 25, 2014

need help1 what function to use? math
An airplane approaches a runway at a 3 degree angle of depresssion. If the plane is flying at 30,000 ft., find the ground distance from the airport to the point directly below the plane when the pilot begins the descent. Round your answer to the nearest foot.
May 25, 2014

trig
Robert is standing on a cliff and looks down at an angle of depression of 62 degrees to look at a boat. The cliff is 76 feet high. How far is the boat from the cliff? Round your answer to two decimal places. The boat is _________ feet from the cliff.
May 24, 2014

geometry
thanks. steve
May 22, 2014

geometry
Part of a road that is 452 meters in length has a slight incline. The vertical rise is 12 meters. Find the angle of elevation. can anybody help? and it must be rounded to the nearest tenth
May 22, 2014

math
To secure a 500 meter radio tower against high winds, guy wires are attached to a ring that is 5 meters from the top of the tower. The wires form a 15 degree angle with the tower. Find the distance from the base of the tower to the guy wire anchor in the ground. Round your ...
May 22, 2014

Statistics
The Jefferson valley bank claims that the variation of their wait time is less when using a single line that feeds three tellers as opposed to having threes peerage lines. Test the claim that the standard deviation for wait time is less than 1.9 minutes with a single feed line...
May 7, 2014

pre calculus
4+7i divided by 2 (problem is written as a fraction) 4+7i _________ 2
May 1, 2014

pre calculus
Express statement as an equation. Use the given information to find the constant proportionality z varies inversely as t. If t  3, then z  5.
May 1, 2014

pre cal
An airplane is flying at a speed of 350 mi/h at an altitude of one mile. The plane passes directly above a radar station at time t  0. (a) Express the distance s (in miles) between the plane and the radar station as a function of the horizontal distance d (in miles) that ...
May 1, 2014

pre calculus
You have a $50 coupon from the manufacturer good for the purchase of a cell phone. The store where you are purchasing your cell phone is offering a 20% discount on all cell phones. Let x represent the regular price of the cell phone. (a) Suppose only the 20% discount applies. ...
May 1, 2014

algebra 2/trig
Tina can paint a room in 8 hours, but when she and her friend Emily work together, they can complete the job in 3 hours. How long would it take Emily to paint the room alone?
April 9, 2014

pre calculus
determine whether the equation defines y as a function of x. √x + y = 12
April 8, 2014

pre calculus
A taxi company charges $2.00 for the first mile (or part of a mile) and 20 cents for each succeeding tenth of a mile (or part). Express the cost C (in dollars) of a ride as a piecewise-defined function of the distance x traveled (in miles) for 0 < x < 2
March 27, 2014

Biology
Read the DNA sequence given below in the 3' to 5' direction and please tell me all of the potential start codons (i.e. every time you see the DNA version of a start codon, even if it does not immediately come after a promoter). 3'-...
March 22, 2014

Biology
What 3' to 5' DNA sequence would correspond to a 5'-AUG-3' start codon?
March 22, 2014

Biology
(This question ties into the previous question I posted about mRNA). Use the Universal triplet code to determine the sequence of amino acids that would be generated for each of the mRNA sequences that you generated in question 2. Remember that the reading of mRNA goes in the 5...
March 22, 2014

Biology
Does it matter which strand is the 'code strand'? The following two sequences look identical, except one runs 3'-5' and the other 5'-3'. For each DNA sequence given below, write the mRNA sequence that would be coded from it. Make sure you indicate the ...
March 22, 2014

Biology
For the DNA sequence given below, write the complementary DNA sequence that would compliment the double-strand DNA 3'--ATTGCTTACTTGCATGGTACCTCTAGCGTTTAGGC--5'
March 22, 2014

Pre-Calc
3x+4y
March 4, 2014

Pre-Calc
why is the line <x,y,z>=<8,9,10>+t<3,4,5> perpendicular to the plane 3x=4y+5z=10
March 4, 2014

chemistry 2
You are instructed to create 800. mL of a 0.69 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. what is the molarity needed for the acid component of the buffer?What is the molarity needed for the base ...
March 4, 2014

pre calculus
Candy and Tim share a paper route. It takes Candy 70 min to deliver all the papers, and it takes Tim 80 min. How long does it take the two when they work together?
March 4, 2014

pre calculus
Jack invests $1000 at a certain annual interest rate, and he invests another $2000 at an annual rate that is one-half percent higher. If he receives a total of $190 interest in 1 year, at what rate is the $1000 invested?
March 4, 2014

pre calculus
solve nonlinear inequality x^4 > x^2
March 3, 2014

Chemistry
If a 0.192 g sample of copper metal reacts with elemental sulfur to form 0.240 g of the sulfide product, (a) find the percent by mass of copper and sulfur in the product and (b) find the empirical formula of the copper sulfide
February 24, 2014

Physics
Determine the displacement of a plane that experiences uniform acceleration from 77 m/s to 110 m/s in 16 seconds.
February 22, 2014

Math (pre calculus)
ax+b/cx+d=2 solve for x
February 20, 2014

calculus
ax+b/cx+d=2 solve for x
February 20, 2014

pre cal
a+1 a-1 B+1 _________ = _______ + _________ B B a Solve for A. Note: I set up problems with underlines so they can look like fractions. That's what they are.
February 20, 2014

Math
Every moment of every day, light pours out from the Sun at the center of our solar system and travels to Earth. It does not arrive at Earth instantaneously though; it takes time to get here. Your task is to figure out how long it takes for light to travel from the Sun to Earth...
February 18, 2014

decorative features
sorry let me try that again... for the subject "decorative features" posted by aduke, some of my answers were the same. However there were some where I had different answers. My different answers are as follows: Q3. My answer is C Q6. B Q8. C Q9. B Q13. D Q14. A Q15...
February 15, 2014

decorative features
=c
February 15, 2014

AP Chemistry- Equilibrium
If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.
February 9, 2014

AP Chemistry- Equilibrium
If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.
February 9, 2014

chemistry
What [Ag1+] is required to start precipitation of AgOH from a saturated solution of Mg(OH)2? Ksp = 2.4 ✕ 10-8 for AgOH and Ksp = 2.6 ✕ 10-11 for Mg(OH)2
February 9, 2014

Math (pre calculus)
please simplify (1/1+x+h) - (1 /1+x ) divided by h
February 6, 2014

pre calculus
Correction: the question is to simplify the FRACTIONAL expression.
February 6, 2014

pre calculus
Simplify the rational expression 3 (1 + x)^1/3 - x (1 + x)^-2/3 divided by (1 + x)^2/3
February 6, 2014

Math (pre calculus)
State whether the given equation is true for all values of the variables (disregard any value that makes a denominator zero) equation one (2/ 4 + x) = (1/2) + (2/x) equation two (1 + x + x^2 / x) = (1/x) + 1 + x
February 6, 2014

Math (pre calculus)
Solve 2^3-x = 5^2x+1 Give an exact solution.
December 12, 2013

Math (pre calculus)
The population of a certain town grows from 10,000 in 1982 to 35,000 in 1995. At this rate, in what year will the population reach 300,000? Tip* Population growth formula: P = P(subzero)multiplied by e^(k)(t)
December 12, 2013

Pre algebra
Vernon drew an 8in. Wide by 5in.tall picture that will be turned into a 48 ft wide billboard.How tall will the actual billboard be?
November 19, 2013

Chemistry, Science
How many Cl- ions are present in 2.35 mol of CaCl2 and please show steps ! Need help so I can study for a huge test tomorrow
November 14, 2013

statistics
In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. More than a decade ago, high levels of lead in the blood put 89% of children at risk. A concerted ...
November 14, 2013

Algebra 2 H
No, its not suppose to have a denominatory
November 9, 2013

Algebra 2 H
well no its a parabola. so there are no discontinuius? How would I find the x-values if they are not.
November 9, 2013

Algebra 2 H
Find x-values if any at which the function f(x)=13x^2-15x-15 is not continuous. Which of the discontinuities are removable? THANKS YOU!!
November 9, 2013

math
. Cimarron Homes Inc. purchased a snow plow for $57,000 and financed the full amount for 5 years at an annual simple interest rate of 9%. a. Find the interest due on the loan. b. Find the monthly payment
November 7, 2013

calculus HELP!
A person stands on a bridge that is 100 feet above a river. If she drops a pebble how fast is it moving after 2 seconds? How long does it take the pebble to reach the river below? She has another pebble that she tosses up with initial speed of 8 feet per second. It goes up, ...
November 6, 2013

Math
I understand what you did but which one would i round it to the 20 speeches or 21 speeches?
October 7, 2013

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