Total # Posts: 537

Chris can be paid in one of two ways. Plan A is a salary of ​\$450 per​ month, plus a commission of 7​% of sales. Plan B is a salary of ​\$681 per​ month, plus a commission of 4​% of sales. For what amount of sales is Chris better off ...

The perimeter of a rectangular field is 380 yd. The length is 10 yd longer than the width. Find the dimensions. Please help and show work thank you

\$9500 is​ invested, part of it at 12​% and part of it at 7​%. For a certain​ year, the total yield is ​\$960.00. How much was invested at each​ rate? PLEASE HELP

math
The perimeter of a rectangular field is 380 yd. The length is 70 yd longer than the width. Find the dimensions. Please help

math
A train leaves a station and travels north at a speed of 105 mph. Two hours​ later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they​ meet? please help

Math
Solve using the elimination method. 2x/5 + y/2 = 3 x/2-y/6=2 Please and Thank you

urgent mc biology
After the blood in is the left heart you would next find it (a)entering the lungs. (b)entering the tissues, like muscles. (c)entering the right heart. (d)leaving the lungs. (e)leaving the tissues, like the muscles. Please help

urgent mc biology
Which of the following do you have less of at the end of cellular respiration than at the beginning? (a)Co-enzyme A (b)ATP synthase (c)ADP (d)the proteins of the electron transport chain (e)FADH2

multiple choice biology
Which of the following do you have less of at the end of cellular respiration than at the beginning? (a)Co-enzyme A (b)ATP synthase (c)ADP (d)the proteins of the electron transport chain (e)FADH2 Please help

biology
After the blood in is the left heart you would next find it (a)entering the lungs. (b)entering the tissues, like muscles. (c)entering the right heart. (d)leaving the lungs. (e)leaving the tissues, like the muscles. Please help

algebra
let f be the function given by f(x)=x^2-4x Find and simplifiy f(x+h)-f(x-h)/h Please show all work Thank you

math
let f be the function f(x)=x(x+2) Find and simplify f(x)-f(-x)/2x I tried pluggin in whatever is for x in the first equation and get an answer for each value but it isn't working out can someone please help thank you

Language Arts
Thank you!

Guys! Really, really need help!

Language Arts
Which answer choice lists ALL of the common nouns in the following sentence? A few days before the race, Shauna met the girls on the street. days, race, Squeaky days, race, street days, race, Squeaky, girls days, race, girls, street ***?? In which sentence is the word GESTURE ...

Economics
Suppose you are a producer of friendship bracelets. How would the following events affect your/the market's willingness and ability supply friendships bracelets? Match the event on the left to the proper determinant on the right. 1. The price of friendship bracelets ...

chemistry
Iron(III) oxide can be reduced to metallic iron by heating it in the presence of carbon. Balance the following equation, then determine the ratio of C to Fe in the reaction? Fe2O3 + C → Fe + CO2?

Physics
A man with a mass(mm) of 71.9 kg stands up in a 95-kg canoe(mc) of length(l) 4.00 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far ...

Geometry
Consider circle T with radius 24 in. and θ = radians. What is the length of minor arc SV?

English
I have a 60 in English and I need to take 2 tests. (they count as 45% of our grade) I really want to get at least an 82, does anybody know what grades I have to make in order to bring it up? I would really appreciate for a fast reply. Thanks!

Algebra
Find the GCF of the terms of the polynomial. 12x+20 A. 2 B. 4 C. 5 D. 10 I think it's B. 4

Algebra
Does y=-3(4^x) represent an exponential function? I think it does, but I'm not sure

Algebra

Algebra
When multiplying two numbers written in scientific notation what do you do with the exponents of the 10? A. multiply B. add C. subtract D. divide I think the answer is A. multiply. Is that correct?

Algebra
Thanks!

Algebra
Ok, so then the correct answer is C?

Algebra
What do you do when you divide two numbers written in exponential notation? A. Add the exponents of the 10 together B. Multiply the exponents of the 10 together C. Subtract one exponent of the 10 from the other D. Divide one exponent of the 10 by the other I think the answer ...

College Algebra Help?!
If a customer purchases a new stereo system during the spring sale, he may choose any 4 CDs from 20 classical and 32 jazz selections. In how many ways can the customer choose 2 of each?

math
Crinzny piens

College Algebra
Thank you so much for your help!

College Algebra
The rodent population in a city is currently estimated at 30,000 and is growing according to the Malthusian model. If it is expected to double every 9 years, when will the population reach one million? (Round your answer to one decimal place.)

Chemistry
a solution is prepared by dissolving 15.0 grams of ni(no3)2 in enough water to make 250 ml of solution what is the molarity of this solution

1. A baker had 10 sacks containing the following amounts of flour: 4 ½ kg, 3 ¼ kg, 2 ½ kg, 2 ½ kg, 4kg, 3 ¼ kg, 4 ¼ kg, 5kg, 2 ½ kg, 3 ¼ kg 2. If the baker redistributed the flour equally among the ten bags, how much ...

I was talking to you Sid.V Thank you very much 😒😒⚔

He is right and if you are wondering, how much does each letter grade count towards your GPA well the answer to that is that an A is worth 3.5-40, B is 2.5-3.49, C is 1.5-2.49, D is 1.0-1.49 and F is 0

Science/Math
If a bacteria reproduced every 5 minutes and you start with one at noon, how many will you have after one hour?

Physics
NASA lost contact with Pioneer 10 on January 22, 2003. How far in meters was it from the sun on that date? Pioneer 10 was traveling at 12.24 km/s relative to the sun. Calculate the position of Pioneer 10 as of January 2009 relative to the sun. Pioneer is headed toward the star...

Physics
011 10.0 points Masses 18 kg and 9 kg are connected by a light string that passes over a frictionless pulley as shown in the figure. The acceleration of gravity is 9.8 m/s2 . 18 kg 9 kg If the 18 kg mass, initially held at rest on the table, is released and moves 1.7 m in 1.4 ...

Physics
A motor cycle, starting from rest, has an acceleration of +2.6 m/s^2. When the motorcycle has traveled a distance of 120 m, it slows down with an acceleration of -1.5 m/s^2 until its velocity is +12 m/s. What is the total displacement of the motorcycle?

PHYSICS
A salesperson leaves the office and drives 26 km north along a straight highway. A turn is made onto a highway that leads in a direction of 60 degrees. The driver continues on the highway for a distance of 62 km and then stops. What is the total displacement of the salesperson...

math
A Ferris wheel has a maximum height of 270 feet and a wheel diameter of 250 feet. Find an equation for the wheel if the center of the wheel is on the​ y-axis and y represents the height above the ground.

Physical science
Help tires rated for 60,000 miles and tread depth of 3/8" Hoe do I estimate how much tread is worn off for every mile driven?

Physics
A mover has to move a heavy sofa of mass 49.0 kg to the second floor of the house. As he pulls on the rope tied to the sofa, he makes sure that the rope is parallel to the surface of the ramp, which is at 30.0° to the horizontal. If the coefficient of kinetic friction ...

Algebra
I would appreciate an explanation of how to simplify this question. Write the fraction as a difference. 3x-7 --- 12

Algebra
Simplify the expression (7+5)+4*13-2 I would like an explanation on how to do this question if you can:)

math
Bob enlarged the size of a photo to a width of 18 inches. What is the new height if it was originally 6 inches tall and 4 inches wide?

Chemistry
okay thanks I didn't know that

Chemistry
Predict the answer to each question according to trends in the periodic table. Justify each answer based on the locations of the elements on the periodic table and/or the shell model. a. Which has a greater atomic radius, Al or Cl? b. Which has a greater ionic radius, Na or S...

Chemistry
thanks

Chemistry
Analyze each table of ionization energy data (in kJ/mol) to identify each element. a. A Period 3 element (1 point) IE1: 496, IE2: 4562, IE3: 6910, IE4: 9453, IE5: 13354, IE6: 16613, IE7:20117 b. A Period 5 element (1 point) IE1: 403, IE2:2633, IE3: 3860, IE4:5080, IE5: 6850, ...

Chemistry
Thank you, but how do I solve for the number of moles? I believe the funny symbols are, respectively, are delta signs in front of the S and arrows in the chemical equations.

Chemistry
Use each equation to predict whether the relative entropy change is S(products) > S(reactants) or S(products) < S(reactants) and whether Î”S > 0 or Î”S < 0 for the chemical reaction represented. Justify your answer in each case. a. 2NH3(g)&...

Geometry
An airplane is flying at a height of two miles above the ground. The distance along the ground from the airplane to the airport is five miles. What is the angle of depression from the airplane to the airport?

Chemistry
Write 3â€“4 sentences to describe how coupling reactions are used to drive an unfavorable chemical reaction

Chemistry
b) Write 3 â€“ 4 sentences to describe the first law of thermodynamics and use it to describe what happens when two substances at different temperatures come in contact with each other. I know the first law states that "energy can neither be created nor ...

Chemistry
Would the reaction for the two metals need something to bond with that doesn't really have an effect, like NO3?

Chemistry
Explain the reaction that would occur in a galvanic cell between solutions of Al3+ and Pb2+. Identify the oxidation and reduction reactions and the location of each reaction. Then, use the standard reduction potential tables to determine the cell potential.

Chemistry
In 3-4 sentences, identify how the geometric structure of NF3 is different than that of NF4+. Explain how the geometry affects the ability of the molecules to experience a dipole effect. (I did the Lewis diagrams for both but I don't know what to do after that)

Physics
The maximum speed of a 3.68-kg mass attached to a spring is 0.688 m/s, and the maximum force exerted on the mass is 11.6 N. What is the amplitude of motion for this mass? (in m) What is the force constant of the spring? (in N/m) What is the frequency of this system? (in Hz)

Physics
A large pendulum with a 200-lb gold-plated bob 12 inches in diameter is on display in the lobby of the United Nations building. Assume that the pendulum has a length of 78.4 ft. It is used to show the rotation of the Earth - for this reason it is referred to as a Foucault ...

Physics
Steam of mass 11.0 g at 100°C is added to 126.7 g of ice at 0.00°C. Find the final temperature of the system.

Physics
After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of = 3.18 m/s. To reach the rack, the ball rolls up a ramp that rises through a vertical distance of = 0.510 m. What is the linear speed of the ball when it ...

Physics
A 10.4-g CD with a radius of 5.85 cm rotates with an angular speed of 33.8 rad/s. What is its kinetic energy? (in J) I need help with this question. I thought you would just use K=1/2mv^2 but when I use m=0.0104kg and v=33.8 I get 5.94 which isn't the correct answer....

Physics
A person exerts a tangential force of 34.8 N on the rim of a disk-shaped merry-go-round of radius 2.60 m and mass 152 kg. If the merry-go-round starts at rest, what is its angular speed after the person has rotated it through an angle of 30.4°? (in rad/s)

biology
Certain insect species have become more and more resistant to insecticides. What type of natural selection is this, and how does it differ from the other types?

Chemistry
What is a balanced equation for a Base-Acid Titration?

Chemistry
Just out of curiosity DrBob222, are you a even real doctor?

Chemistry
I just needed help, not your opinion if I can do it or not.

Chemistry
Well I figured out the equations, I just have no clue on what to do about the "design an experiment" part

Chemistry
Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine, phosphorus pentachloride (...

Math
You can predict that Evelyn will roll a sum of 5 about 12 times.

Science
3550J

Physics
A small box is held in place against a rough wall by someone pushing on it with a force directed upward at 29.8° above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.400 and 0.320, respectively. The box slides down unless the...

Physics
What is the magnitude of the acceleration of two falling sky divers (mass 149 kg including parachute) when the upward force of air resistance is equal to one fourth of their weight? (in m/s^2) After popping open the parachute, the divers descend leisurely to the ground at ...

Physics
An elevator (mass 5000 kg) is to be designed so that the maximum acceleration is 0.0620 g. What is the maximum force the motor should exert on the supporting cable? (in N) What is the minimum force the motor should exert on the supporting cable? (in N)

Physics
I don't understand how to begin these problems. I'm terrible at physics. Just looking for a little help and you are so rude. If you aren't looking to help kids do/understand their homework you shouldn't be on this site DrBob222.

Physics
A 0.133 kg baseball traveling 30.6 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 11.4 cm. What was the average force applied by the ball on the glove? (in N)

Physics
A place kicker must kick a football from a point 35.0 m (= 38.3 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 19.8 m/s at an angle of 45.0o to the horizontal. By how much does the ball ...

Physics
A projectile is launched with an initial speed . At its highest point, the projectile's speed is . What was the launch angle above the horizontal? (in deg)

Physics
Riding in an elevator, a man notices that he feel heavier or lighter based when the elevator speeds up or slows down. He stands on a bathroom scale in the elevator to take some measurements. Assume that his mass is 85 kg. a. What is this man’s weight while at rest? b. ...

Algebra
\$20, \$25, \$30, \$21, \$10, \$15, \$11, \$5, \$6, \$1

Physics
In the picture to the right, a ring pulls a box of mass m = 5.0 kg across a level table. The string pulls with a tension F = 25.0 N at an angle θ = 25˚ above the horizontal. A frictional force of 4.0 N also acts on the box. Calculate a. the normal force on the box. b...

Physics
A bird sits at rest in the middle of a wire. The wire slopes upward at 5* from the horizontal on either side of the bird. If the wire on both sides of the bird is experiencing a tension force of 106 N, then what is the mass of the bird?

Language Arts
The answers are. A ,C. B. B. D. C. D. B. A. C. B. OPEN ENDED. .

Physics
He is standing at the edge of a rose garden at H = 4.62 m below her window and at D = 5.21 m from the base of the wall. How fast are the pebbles going when they hit her window?

physics
A diver running 1.89 m/s dives out horizontally from the edge of a vertical cliff and 2.88 s later reaches the water below. How high was the cliff. (in m)

physics
The components of a vector V are often written (Vx, Vy, Vz). What is the x component of a vector which is the sum of the two vectors, V1 and V2, whose components are (3.27, 1.86, 0.00) and (3.85, -3.53, -1.43)?

Math
Did you ever get the answer??

chemistry
How much work is done at 1.2 atm and 316 K when 1 mole of propane undergoes combustion? C3H8 (l) + 5O2 (g) → 3CO2 (g) + 4H2O (l)

Physics
A particle moves along the x axis. Its position is given by the equation x = 2.00 + 3.20t - 3.85 t2 with x in meters and t in seconds. Determine its position at the instant it changes direction. (in m)

Physics
A speedboat moving at 29 m/s approaches a no-wake buoy marker 98.3 m ahead. The pilot slows the boat with a constant acceleration of -3.61 m/s2 by reducing the throttle. How long does it take the boat to reach the buoy? (in s)

Physics
A driver in a car traveling at a speed of 56.1 mi/h sees a deer 103 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assuming that the deer does not move in the meantime). (in m/s^2)

Physics
A stone is dropped from the top of a cliff. It hits the ground below after 3.12 s. How high is the cliff? (in m)

Physics
In coming to a stop, a car leaves skid marks 97.0 m long on the highway. Assuming a deceleration of 6.60 m/s2, estimate the speed of the car just before braking. (in m/s)

Physics
At highway speeds, a particular automobile is capable of an acceleration of about 1.52 m/s2. At this rate, how long does it take to accelerate from 74.0 km/h to 104.0 km/h? (in s)

Language arts
The answers are B. C. C. D. .

chemistry
22.0 grams of zinc reacted with 95.0 mL of 0.5 Molarity HCl. What volume of hydrogen gas would be produced at 22 degrees C and 745 torr?

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