Posts by Kay
Total # Posts: 817

Chemistry
HA(aq) <> H+(aq) + A(aq) K = 5.0 x 10 9 The initial concentration of HA is 0.30 M What is the final equilibrium concentrations of HA, H+, A? Show work, solve if you can 
Chemistry
The rate equation for the hydrolysis of sucrose to fructose and glucose is first order. After 27 minutes the sucrose concentration decreased from 0.0146M to 0.0132M. Find the rate constant K. Please help me! 
Social studies
Why were the island shown on this map most likely acquired or annexed by the United States? 
Genetics
Given the following portion of a double stranded DNA molecule, 3’GATCTCGATGTCGAGATC5’ draw the bands as they would appear on a Sanger DNA sequencing gel using the following primer 5’GATCTCGA3’ 
Trig
A tourist looks from the observation deck of the space needle in Seattle. The deck is at a height of 520ft. She sees her friend on the ground below at an angle of depression of 83.1 degrees. What is the distance between the two? Round to the nearest tenth of a foot. Options: ... 
Trig
Last question! Just seeing why I’m getting these wrong In a right triangle with a leg of 4 and a hypotenuse of 8, find the measure of all angles. Correct answer: 30deg, 60deg, 90deg How? 
Trig.
Thank you 
Trig.
Given sin ? 3/5, find a, the other angle in the right triangle The answer is 30,60,90 How is this someone explain? 
Trigonometry
Thank you 
Trigonometry
a 10ft ladder is resting against the wall. the ladder touches the ground 6ft away from the wall. what angle, rounded to the nearest tenth, id the bottom of the ladder making with the ground The correct answer is 53.1 degrees Can someone explain how to get this? 
physics
The height of the Empire State building is 318.00 meters. A pebble is dropped from the top of the building, what is the stones velocity just before it strikes the ground? 
Chemistry
If the pressure of the gas inside the flask were increased and the height of the column in the openended arm went up by 0.5mm, what would be the new pressure of the gas in the flask, in torr? ANSWER IS 807.3 TORR 
math
The temperature on Saturday was 4 degrees Fahrenhit.The temperature on sunday was 9 degrees warmer than the temperature on Saturday.Was the temperature in degrees Fahrenhit positive or negative explain, 
german
1. Ich ___ warmes Wetter gern. ( 2 points ) A. bist B. habe C. bin D. hat 2. Wur ___ Sport gern. ( 2 points ) A. habe B. habt C. hast D. haben 3. ___ du Schnee gern? ( 2 points ) A. hast B. haben C. hat D. habt 4. Herr Barker ___ Amerikaner. ( 2 points ) A. sind B. ist C. seid... 
corrected LA
if your wrong let me know I don't want to fail 
American Government
1d 2a 3d 4b 5c 6a 7b 8b 9a 10 d 11 b 12 c 13 c 14 c 15 b 16 d Lesson 10 unit 8 Have a amazing day : ) 
social studies
they are mountains 
social studies
The types of crops grown by farms in the Andes is influenced in large part by A. elevation. B. latitude. C. longitude. D. pampas. 
Science HELP
Although the Amazon Basin receives more than 80 inches of rain per year, South America also has the driest place on Earth, known as A. Death Valley. B. Gobi Desert. C. Atacama Desert. D. the Caribbean. 
geometry
apply the transformation m to the triangle with the given vertices. name the coordinates of the image points. identify and describe the transformation m: (x, y) > (1.5x, 1.5y) l(1, 4), m(4, 4), n(4, 3) 
Math
Which of these is a step in constructing and inscribed regular hexagon using technology? Create circle B with radius AB. Draw line FG. Draw point E anywhere on segment DB. Mark the points of intersection between circle A and line AB. 
Science
Do u guys have the CLASSIFYING ANIMALS PART 2 QUIZ? LET ME KNOW ASAP. 
Math
How to use the hundredths grids to subtract 1.650.98 
algebra
2(416)+/412 
math
On average, the earth is 93 million miles away from the center of the sun. The complete revolution around the sun takes 1 year. how fast is the earth moving in this orbit in feet per second? 
PreCal
a car went 44 feet through an intersection in only 0.5 seconds. How fast was the car going in miles per hour? 
PreCal
On average, the earth in 93 million miles away from the center of the sun. a.) assuming that the earth's orbit is circular, estimate the number of miles our planet travels in one complete revolution around the sun. 
algebra
1. simplify the rational expression by rationalizing the denominator? 4 over sqrt 150 __________________ sqrt 189x 
Algebra B
1. simplify the rational expression by rationalizing the denominator? 4 over sqrt 150 __________________ sqrt 189x 
Chemistry
The half life of a radioactive material is 120 months. How much of this material will be left after 350 months if the initial concentration is 2.40M? 
Science
The periodic table is arranged according to several trends. Which of the following is true as you move from left to right along the periodic table: A the element's atomic mass decreases and the atomic number increases B the element's productivity increases C the ... 
P.E
Anger is a normal emotion that all humans feel at some time. It is important to express this emotion in a healthy way. Which of these ways of dealing with anger might affect your health in a negative way? A.) Accept your feelings B.) Ignore your triggers C.) Talk about the ... 
Accounting
No idea 
Math
A circle is divided into 20 equal parts. Find the angle measure of one of the parts . 
Math
6 friends share 5 apples equally. How much apple does each friend have? 
Social studies
Is it b 
Physics
Question: A 62 kg astronaut floats outside a 3200 kg spacecraft. She's initially stationary with respect to the spacecraft. Then she pushes against the spacecraft and moves away at .50m/s to the left. I got an answer of .0096kg from doing 62*.50/3200 but that is incorrect... 
Science
Identify six stages of the process of scientific inquiry (scientific method) and explain why the process is not a rigid sequence of steps. 
Social studies
yes 
Math
Meghan and Sabrina compared the amount of interest they each earned on their savings accounts. Each had deposited $1000, but Meghan earned $140 interest and Sabrina earned $157.50. Whose savings account had a higher interest rate? Explain. 
Math
Nick borrowed $7150, to be repaired at an annual simple interest rate of 6.25%. How much interest will be due after 5 years? How much will Nick have to repay? 
Physics
A helicopter rises vertically with a constant upward acceleration of 0.40 m/s2 . As it passes an altitude of 20 m, a wrench slips out the door. A) How soon does the wrench hit the ground? B) At what speed does the wrench hit the ground? 
Physics
After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 2.5 m/s from 1.5 m above the ground. A) How much time does it take until the book hits the floor? B) What's its velocity then? 
Physics
You're approaching an intersection at 50 km/h (13.9 m/s ). You see the light turn yellow when you're 35 m from the intersection. Assume a reaction time of 0.6 s before braking begins and a braking acceleration of 3.0 m/s2. A) will you be able to stop at before the ... 
Physics
A stock car starts from rest at time t=0 with velocity (m/s) increasing for 4.0 s , according to the function Vx=1.4t2+1.1t. a) Find the car's velocity at the end of the 4.0 s interval. b) Find the average acceleration for this interval. 
Physics
A car travels a straight road at 140 km/h for 30 min then at 90 km/h for 10 min. It then reverses and goes at 90 km/h for 20 min. a) Find the average velocity for the entire trip. b) Find the average speed for the entire trip. 
Physics
The winner of the Kentucky Derby runs the 1.25mile race in 2 minutes, 2.0 s. What's the horse's average speed in m/s? A Message from Your Instructor: Velocity refers to the displacement from the initial point to the final point. For the first part, determine where the... 
Algebra
a submarine was cruising at a depth of 1,375 feet. The captain gave an order to climb 450 feet. Compared to sea level , find the depth of the sub 
SAT Math
The function w is defined by w(x)=6+3x. If 4? w(z)=96, what is the value of z? So is w(x)=w(z)? 
SAT Math Question?
Lindsey and Stephen work at a factory. Lindsey can complete one full job in three hours, and Stephen can complete the same job in five hours. If Lindsey and Stephen work together on the job for one hour, then how long, in minutes, will it take Stephen to finish the job himself? 
SAT Math
The correct answer is 3/5, but I don't know how. Thank you! 
SAT Math
All of the students who took chemistry at Groveton High School last year were juniors or seniors, as shown in the table below. If 80% of the students who took chemistry passed, then what fraction of the students in the combined junior and senior classes took chemistry? Class ... 
SAT Math
If m percent of 50 is equal to 20 percent of n, then what is the value of m/n? Thank you! 
SAT Math Question?
Which of the following accurately defines all possible values of pq if 15?p?30 and 7?q?19? The answer is 4?(pq)?23, but I'm not sure how. Thank you! 
American Government
Yes! thank you 
Math
There are 12 more girls than boys in the class. 35 % of the class are boys. How many pupils are there in the class? 
physics
an aeroplane has a mass of 15 tonnes. At cruising speed,air flows over the top of it's wing at 150 m/s and under the wing at 120m/s. Calculate the pressure in difference between the top and the bottom of the wing and the surface area underside the wing 
Physics
An object is sliding along a flat surface with an initial speed of 30 m/s. What must the coefficient of kinetic friction be between the object and the surface if the object slides to a stop in 10m? What would be the speed of the object after it had only slide half that distance? 
English
supposed** 
English
There is no need for you to be rude Les. She meant how are we suppsoed to help if you dont give out a list of the stories we had read. Im also in this class. 
Chemistry
Onethird cup of vanilla ice cream provides about 145 kcal of energy. A typical adult uses about 195 kcal/hr of energy while walking. If all of the energy in one third of a cup vanilla ice cream were to be burned off by walking, how many minutes would it take for this energy ... 
English
is it A or not?!? 
Algebra
The formula I = PRT where I = Interest, P = principal, R = rate, and T = time is used to calculate the amount of simple interest earned. Solve this formula for T. 
History
In what way was the government of ancient Athens different from that of the United States? A. Athens was direct democracy in which citizens voted on laws themselves B. Athens was an oligarchy ruled by the wealthy members of the council of 5 hundred. C. Athens was a republic in... 
Math
You are buying 4 tickets for a football game on stub hub for tickets are $60 each you have to pay a handling fee of $5 per ticket and a shipping fee of 10 for the entire order How much is or going to cost? How much does each person owe you for their fair share? 
Math
Jay can jump rope at a rate of 8 jumps for every 10 seconds . Find the rate 
spanish 2
DOES ANYONE KNOW THESE?!?? 
Maths
0.5 of peters money is 3.50 how much money has he altogether 
math
If one person can do a job in 60 minutes and another per can do it in 90 minutes, how long will it take them, working together, to do the job? 
Physics
You are testing a car on the Nevada salt flats traveling 85 m/s. Your parachute deploys and you decelerate at 13 m/s^2. How long does it take to come to a complete stop? 
Math 6th grade
Tony owns a personal training business. He makes a total of $500 for every 3 clients he acquires. If Tony is saving to purchase 2,2000 in new equipment , how many clients will he need? 
Science
Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks. By reading the records that... 
Math
Which equation represents the situation? The sum of three consecutive integers is 36. x+(x+3)+(x+3)=36 x+(x+1)+(x+2)=36 x+(x+2)+(x+4)=36 x+x+x=36 
ss
i mean d 
ss
A. By gaining control of Quebec, the British could increase financial and military support from the colonists.*** B.By gaining control of Quebec, the British would disrupt French supplies from reaching forts further north. C. Without capturing Quebec, the British would have ... 
astronomy (check my answer)
I think it's a, that Regulus is further away than Denebola. 
astronomy
At your telescope, you measure the parallax of the star Regulus to be onehalf of the parallax of the star Denebola. What do you immediately know about their relative distance from us? a) That Regulus is further away than Denebola. b) That Regulus is closer than Denebola. c) ... 
math
A popular snack food reduced the amount of sodium in one serving from 700 milligrams to 630 milligrams. What is the percent decrease in the amount of sodium in this snack? 
Social Studies Help ASAP
1. b 2. correct 3. b & c 4. b 
Algerbra
BKgo to the site called openstudy they will actually tell you the answers and help you. 
Social Studies (check my answers))
1. b 2. d 
math
33 pounds of bananas cost $163.50. how much would 18 pounds cost? how much would a one pound banana cost? 
GEOMETRY
A gumball machine contains 150 gumballs. If the probability of getting a yellow gumball is 1/7, what is the probability of not getting a yellow gumball? 
GEOMETRY
if one coin is flipped and then a second coin is flipped, what is the probability that both coins land on tails? A) 1/8 B) 1/32 C) 1/16 D) 1/4 
GEOMETRY
A soda company determines that there is a 3% chance that a soft drink bottle is under filled. If two bottles are selected at random, find the probability that both bottles are under filled 
GEOMETRY
if a die is tossed and a coin is flipped, what is the probability of getting a number less than five on the die or tails on the coin? (write answer as a fraction in lowest terms) 
GEOMETRY
A letter is chosen at random from the word mathematics. what is the probability of choosing either a T or an M? A) 4/11 B) 3/11 C) 1/11 D) 2/11 
GEOMETRY
a bag contains seven red balls numbered 2,4,5,6,7,8,10 and three white balls numbered 1,3, and 9. If a ball is drawn, what is the probability the ball is white or the number on the ball is less than 3? Write your answer as a fraction in lowest terms. 
GEOMETRY
from a bag containing 6 white balls, 3 black balls and 13 red balls, two balls are drawn at random. what is the probability that they are both red? 
Math
Every 1 1/2 on a wilderness map represents 1 mile. If the actual distance between two likes is 10 miles how far apart are the lakes on the map? 
physics
A reflecting telescope is used to observe two distant point sources that are 3.50 m apart with light of wavelength 600 nm. The telescope's mirror has a radius of 5.0 cm . What is the maximum distance in meters at which the two sources may be distinguished? 
CHEM 2: Boiling Point
Which Aqueous solution has the highest normal boiling point? a.) 0.1 m NaCl b.) 0.1 m C2H5OH c.) 0.1 m CaCl2 d.) They all have the same boiling point. I think that the answer is D, the all have the same boiling point. Is this correct? Because Delta T= K(b)msolute .... and if ... 
CHEM 2 Question
For A+2B <> 2C : K=2.23 For 2C <> D : K=0.27 What is the value of the equilibrium constant for the reaction: 2D <> 2A + 4B ? I calculated it and got this: k=(k1)(k2) =(2.23)(.27)=0.6021 =(1/0.6021)=1.67 =(1.67)^2= 2.76 Is this answer correct? I am ... 
Science Chemistry
So the answer is: 43.78 / 46.068 = 0.929 M? 
Science Chemistry
A sample of beer is 4.6% by Mass C2H5OH. The density of beer is 0.93 g/mL. What is the molar concentration of C2H5OH in this sample of beer? 
Algebra
3fg(,f^2+5f4)= 
science
the answer is D. I just took the test and got it right 
Math
Don't trust the person "helping you" at all . They are a lier!!! 
math
Math star . What are the answers? 
Chemistry
What is osmolarity of a 0.20M MgSO4 solution, which is 50% dissociated?