Thursday
October 20, 2016

# Posts by MARY

Total # Posts: 3,712

pre-calc
e^-1 cost +sint(-e^-t)=0
October 20, 2016

pre-calc
Solve for t if 0<t<2pi Note: both are less than or equal to . Please help!! I am not sure what I should do.
October 20, 2016

physics
Two objects are positioned and moving . m 1 = 7 kg ,m 2 =11 kg, and the coefficient of kinetic friction between object 1 and the tabletop is uk = 0.14. Find the acceleration of object 2(assuming up is the positive direction) as well as the tension in the string.
October 18, 2016

Chemistry
These were all correct 100%
October 18, 2016

Chemistry
What do you mean "ok"? Are they correct?
October 18, 2016

Chemistry
1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation? A) A positive charge...
October 18, 2016

Math
How many square tiles with sides 1 foot long would be needed to cover the floor of an 8' x 10' room
October 17, 2016

Engineering
October 17, 2016

Engineering
If the cost of a .75 x 6.o x 19.0 sheet of ABS plastic is \$18.00, what is the cost to make 20 parts? each part has a mass of .437lb.
October 17, 2016

Engineering
.437 lbs
October 17, 2016

Engineering
Damon the mass is .437 per part. It should be a simple problem for me but I am not sure right now. Thanks for your help.
October 17, 2016

Engineering
If the cost of a .75 x 6.0 x 19.0 sheet of ABS plastic is \$18.00, what is the cost to make 20 parts?
October 17, 2016

Chemistry
1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation? A) A positive charge...
October 17, 2016

Science/Math
You put 50 mL of water in a graduated cylinder, then you place an object in the water. The level rises to 55 mL. What is the volume of the object?
October 16, 2016

Physics
A projectile is launched horizontally from a cliff and has initial speed 30 m/s. The projectile will hit the ground 10 s later. What is the horizontal component of the projectile's velocity 5.0 s after launch. Assume air resistance is negligible.
October 14, 2016

Physics
A man chased by the army, leaps with speed 12 m/s at a 47 degree angle above the horizontal from the top of a building. If he lands 40.0 m from the base of the building, then finds the height of the building
October 13, 2016

math
Before 1986, a gold bullion in the Federal Reserve Bank was rectangular and had a volume of approximately 727.7 cm3. The density of gold is 19.3 g/cm3. A pound is approximately 454 g. Find the weight of one gold bullion to the nearest tenth of a pound
October 11, 2016

Chemistry
#3 was wrong.
October 10, 2016

Chemistry
1) The letter "p" in the symbol 4p^3 indicates the ___. A) spin of an electron B) orbital shape*** C) principal energy level D) speed of an electron 2) If the spin of one electron in an orbital is clockwise, what is the spin of the other electron in that orbital? A) ...
October 10, 2016

French
I have a Windows PC and thank you!
October 10, 2016

French
Thank you
October 10, 2016

French
Check answers? 1) Write a comparative sentence: La tortue est intelligente mais le poisson est tres intelligent. A) La tortue est moins intelligente que le poisson.*** B) La tortue est aussi intelligente que le poisson. C) La tortue est plus intelligente que le poisson. 2) ...
October 10, 2016

Math
Byong Sun withdraws \$15 from his bank account once each day for four days. what integer represents the change in the amount in the account? find the integer that would represent the change in the amount in the account if Byong Su deposits \$15 into his bank account once each ...
October 9, 2016

American Government
Check answers? 1) What is the main difference between the formal and informal qualifications for the House of Representatives? A) Formal qualifications are outlined in the Constitution**** B) Formal qualifications do not have to be followed C) Informal qualifications deal with...
October 7, 2016

Precalculus
For this problem, we will use the formula for position of an object. y=1/2at^2+vot+ho, where t is time in seconds, a is acceleration in meters per second squared (in this case gravity so -9.8 m/s2), v0 is the initial velocity in meters per second, and h0 is the initial height ...
October 7, 2016

Geometry
1) What are the converse, inverse, and contrapositive of the statement? Which statements are true? If the figure is a rectangle with sides 2 cm and 3 cm, then it has a perimeter of 10cm. My A: the statement is not true. 2) What are the hypothesis and the conclusion of the ...
October 7, 2016

MS. SUE HELP- Chemistry
Check answers? 1) Why did J.J. Thomson reason that electrons must be a part of the atoms of all elements? A) Cathode rays are negatively charged particles**** B) Cathode rays can be deflected by magnets C) An electron is 2000 times lighter than a hydrogen atom D) Charge-to-...
October 7, 2016

Chemistry
Check answers? 1) Why did J.J. Thomson reason that electrons must be a part of the atoms of all elements? A) Cathode rays are negatively charged particles**** B) Cathode rays can be deflected by magnets C) An electron is 2000 times lighter than a hydrogen atom D) Charge-to-...
October 7, 2016

Physics
A cute puppy walks 20 m at 30 degrees north of east and then continues another 45 m at 15 degrees south of east. Find the magnitude of the puppy's net displacement (or the distance from the starting point)
October 6, 2016

physics
If a vector K has component Kx = 4.1 and Ky = -13, then find the magnitude K and direction (as a positive rotation angle relative to the +x axis) of the vector.
October 6, 2016

Math
How many complete sets of aprons could you make out of 5 1/2 bolts of material and 1 bolt is equal to 15 yards? there are adult size which needs 3/4 yard material to make and child size which takes 1/2 yard to make.
October 5, 2016

Physics
A net force is applied to an object, the same net force is then applied to a second object with 6.2 times the mass of the first then the acceleration of the second object will be how many times the acceleration of the first object?
September 30, 2016

Physics
If a 350 kg object is moving with constant velocity 22 m/s due east then what is the magnitude of the net force acting on the object?
September 30, 2016

Physics
A taxicab moves 5 blocks due north, 5 blocks due east, and another 2 blocks due north. Assume all blocks are of equal size. What is the magnitude of the taxi's displacement?
September 27, 2016

Physics
A science student is riding on a flatcar of a train along a strait, horizontal track at a constant speed of 12.0 m/s. The student throws a ball into the air along a path he judges to make an initial angle 65. deg with the horizontal and to be in line with the track. The ...
September 25, 2016

HCC
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.5 m/s , and the distance between them is 57.0 m . After t1 = 4.00 s , the motorcycle starts to accelerate...
September 25, 2016

Algebra
A coaxial cable 10 feet long is cut into two pieces such that the length of one piece is two-thirds of the length of the other piece. Find the length of the shorter piece of cable.
September 25, 2016

Math
Solve the inequality: 1/4w +3 is less than -6
September 25, 2016

Chemistry
What is the volume of the oxygen produced when 1.00L carbon dioxide reacts with 20.0 g of Na2O2 based on the following unbalanced reaction at 25C and 2.00 bar? Na2O2 + CO2 -> O2 + Na2CO3 R = 0.083145 L bar K-1 mol-1 I got 1.57L but the answer is 500mL
September 25, 2016

economics
This chart shows the components of nominal GDP for the years 2000 and 2001. All figures are in billions of current dollars. Components 2000 2001 Consumption \$6,684 \$6,987 Investment \$1,755 \$1,560 Government Spending \$1,751 \$1,858 Exports \$1,101 \$1,034 Imports \$1,467 \$1,383 ...
September 23, 2016

Math
Emma estimated the first digit in the quotient of 2,183 ÷ 42 as 4. She adjusted the quotient. What did zhe do wrong? Explain
September 22, 2016

Algebra
The difference of two numbers is 47. The larger number is three less than six times the smaller number. Find the numbers.
September 16, 2016

Linear Algebra
Please , I don´t know how to do this demonstration: If A and B are mutually perpendicular vectors( different to zero vector) and "c" is any number show that : || A +cB ||>= ||A||
September 15, 2016

math
I would say around 5 or 6
September 15, 2016

Calculus
Hello I need help with this excersise of derivative of a inverse function. The excersise says: If f(x+2)=x^3+1 and g(x)=f(arctg x), find the derivative of the inverse function of g(x) and then calculate (g^-1 (9))'[the derivative of the inverse function evaluated in 9] . I...
September 14, 2016

math
half the difference of 4 from 14 added to 5
September 13, 2016

math
A hare is in a 100m race. it starts the race at a particular speed s. halfway through the race, it notices its losing, and increases its speed by an additional 15m/s. Write a formula for how long the hare took on the first half of the race, in terms of s.
September 12, 2016

mac1105
A driver averaged 43-miles per hour and took 6 hours to travel between two cities? What is the distance between the two​ cities?
September 12, 2016

Calculus
Well I cannot use L´Hopital´s Rule. :c
September 12, 2016

Calculus
Hello, I need help with this limit: Lim ((arctanx-x)/x^3) X->0 I can't use L'Hospital Rule or series. I don't get what to do. Can you give an idea?
September 12, 2016

Math
Sam ranks movies on a scale of 1-100. If he adds 2 points to each movie in his collection, and the range of the ranking was 54, what is the range when the 2 points are added ?
September 11, 2016

Math
If P^2+q^2 = 25 and 2 pq=10. What is the value of (p-q) ^2?
September 11, 2016

Calculus
I really need help. Create an appropriate table of values for the function f(x)=tan3x/7x and use the reslut to estimate lim as x approaches 0 tan3x/7x
September 7, 2016

Chemistry
Hello I need help with this excersise: How many moles of NH4Cl are neccesary to add to 1 liter of solution of Co2+ 0,20 M in order to prevent the precipitation when the solution is saturated with H2S (0,1M) and the pH is 7,50. It 's known that pKbNH3=4,75 ; Kps(CoS)=2,0&...
September 2, 2016

CHEMISTRY
CALCULATE THE DECREASE IN TEMPERATURE FOR 22.0 G SILVER THAT LOSES 625 J
September 2, 2016

Math
Blake watched 1/6 of a movie on Friday,3/5 of amovie on saturday, and the rest on sunday. What fraction of the movie did he watch on Sunday?
August 30, 2016

Algebra2
Is it y=6x?
August 29, 2016

Science
What science field is Vantablack considered to be part of?
August 13, 2016

statistics
A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4 and 1 kilograms of ...
August 8, 2016

Social studies
if a savings account can suddenly buy much more than before does that mean deflation is occuring?
August 1, 2016

Algebra
An aeroplain flies at a constant altittude of 4000 flies above sea level.at it start to land it descend at a constant rate at X rate per mins .at what altittude is the plane Ymins after it begins to descend
July 21, 2016

penn foster child care
A pre schooler should drink ____________ ounces of milk each day
July 18, 2016

pre algebra
A flower bed is in the shape of a triangle with one side twice the length of the shortest​ side, and the third side is 30 feet more than the length of the shortest side. Find the dimensions if the perimeter is 138 feet
June 30, 2016

Math- Assignment Due
Please help me, it would be greatly appreciated. 1.) A set of data was collected as shown in the table. Data value: Frequency: 5. 9 6. 9 7. 14 8. 9 9. 13 10. 7 11. 9 The standard deviation of the data is A..) 1.90 B.) 2.00 C.) 2.33 D.) 7.93 2.) A group of apples from a ...
June 29, 2016

ENGLISH
June 19, 2016

computer studiea
: 88% 100% 100% 100% 16% what is overall percentage
June 17, 2016

Biology
Uable to find correct answer: In general it is expected_____________ A) hydrostatic pressure will remain constant throughout the capillary bed B) osmotic pressure will be higher in the arteriole end of the capillary bed compared to the venous end C) osmotic pressure will be ...
June 10, 2016

English
Change passive voice into active
June 6, 2016

Anatomy
I have the formula to problem but can not come up with any of the answers. Problem: Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat, end diastolic volume (EDV) is 140 ml, and end systolic volume (ESV) is 30 ml. select ...
June 5, 2016

13. Complete the sentence with the word that has the most positive connotation. She was wrong and too_____ to admit it. ￼￼￼￼￼￼￼￼￼￼￼￼bullheaded headstrong hardheaded determined**** 14. What is ...
June 3, 2016

Would number 2 be A?
June 2, 2016

Ok i just checked them out, thank you. But can you still check my answers for 8,9, and 10. In the questions below those were unclear. It would also be great if you could check all of them so that I can get your opinion rather than just Mrs. Sue's. Thanks!
June 2, 2016

1. Mexico's economy is based largely on (2 points) oil exports. mining. agriculture and livestock.** industry. 2. Many indigenous people in Guatemala live in the mountains because (2 points) it is the only land available to them. the soil is very good for farming. they don...
June 2, 2016

LA
May 23, 2016

LA
8. Whose attitude toward Scrooge is the most severe? (1 point) Marley's Bob Cratchit's the Ghost of Christmas Present's Mrs. Cratchit's
May 23, 2016

Math
I have 2 similar triangles. The surface area of the smaller one is 27m squared. The scale factor is 3. How do I find the surface area of the larger triangle
May 17, 2016

math
angle PQR and angle TQV are vertical angles. The measure of the two angles have a sum of 100*. Write and solve an equation to find x, the measure of angle TQV.
May 16, 2016

Calculus
Consider the region in the plane consisting of points (x, y) satisfying x > 0, y > 0, and lying between the curves y=x^2 +1and y=2x^2 −2. (b) Calculate the area of this region.
May 16, 2016

math
If the angles of a quadrilateral are x,x+10,x+20 and x+30 degrees find the value of each
May 15, 2016

math
3:55 +25 minutes =4:20
May 4, 2016

algebra
I still don't get is I knopw max of parabola is -b/2a but this isn't quadratic
May 4, 2016

algebra
a candy company has 130 pounds of cashews and 170 pounds of peanuts which they combine into different mixes the deluxe has half cashews and half peanuts and sells for \$7 a pound the economy mix has one third cashews and two thirds peanuts and sells for 5.40 a pound how many ...
May 4, 2016

math
(32*7.50)*4=960 1 week of pay times 4 weeks
May 4, 2016

college algebra
a candy company has 130 pounds of cashews and 170 pounds of peanuts which they combine into different mixes good luck stats has half cash and half peanuts and sells for \$7 a pound become a mix has one third cashews and two thirds peanuts and sells for 5.40 a pound how many ...
May 4, 2016

chemistry
Which conducts better, BeCl MgCl2
May 1, 2016

Math
I need help please. 89°F= ___C
May 1, 2016

math
what number am I? My ten-thousands digit is 4 less than my thousands digit. My thousands digit is 3 times my hundreds digit. My hundreds digit is 1/2 tens digit. My tens digit is 6. My ones digit is 3 more than my tens digit.
April 27, 2016

Math
What is the mystery number sentence? Its factors are divisible by 3. Its factors are divisible by 10. Its product is greater than 2500. Its product is less than 3000.
April 27, 2016

math
A cylindrical tank with diameter 20in. is half filled with water. How much will the water level rise if a metallic ball of radius 4 in. is placed in the tank?
April 26, 2016

AP
. Plant -+ Deer --+ Tiger The first step in the energy chain that created the bonds of proteins in the tiger's muscle cells in the food chain shown above is the A. deer the tiger ate. B. plant the deer ate. C. photons the sun made. D. carbohydrates the plant made. I am ...
April 20, 2016

Chemistry
A 50 g piece metal is placed in 250 g of methanol at 0 °C. The methanol is warmed to a temperature of 5 °C. What is the specific heat of the metal?
April 18, 2016

Math
The tile store has three different brown tiles mr Jacobs can use. The tile prices are shown in the table. Which tile can he purchase to stay in his budget and meet the design for 38 tiles? His budget is \$1200.00
April 16, 2016

Calculus
Find the volume of the solid generated by rotating the region 0<y<5-x^2 about the x-axis
April 14, 2016

Chem 1410
How many moles of methane occupy a volume of 3.00 L at 55.0 degrees C and 0.600 atm? (R=o.o821 atm*L/mol*K)
April 14, 2016

maths
A train driver moving at 40km|h applies break so that there is a constant retardation of 0.5m|s find time taken before the train stops
April 13, 2016

Spanish
The question: ¿Qué obras de arte o de literatura influyen en tu vida? Your answer: Una obra de literatura que influye en mi vida es To Kill a Mockingbird. The question is actually asking: What works or art or literature influence your life? The question is not ...
April 5, 2016

accounting
An employee earns \$20 per hour and 1.75 times that rate for all hours in excess of 40 hours per week. Assume that the employee worked 55 hours during the week, and that the gross pay prior to the current week totaled \$29,000. Assume further that the social security tax rate ...
April 2, 2016

maths
Data were collected on the differences in weight gains of 12 people one month after they stopped smoking, compared with their weight at the time when they stopped smoking. The data are given in Table 2. A positive quantity corresponds to a gain in weight, a negative quantity ...
March 30, 2016

Spanish
Estos calcetines translates to "these socks". It's most likely that you are talking about the socks in your hand because they are closest to you.
March 29, 2016

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