Thursday
September 29, 2016

# Posts by Mary

Total # Posts: 3,675

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

Math problems
On her math test, Terry got 52 questions correct out of 68. What percent of the test questions did Marie answer correctly?
March 27, 2016

PHYSICS
no this is the correct answer : N = ma= mg- mv²/R= 1800•9.8-1800•9.24²/18.4 =9287.84 N
March 27, 2016

PHYSICS
Suppose a 1800-kg car passes over a bump in a roadway that follows the arc of a circle of radius 18.4 m as in the figure shown below. (a) What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 9.24 m/s? (Neglect any ...
March 27, 2016

physics
Suppose a 1800-kg car passes over a bump in a roadway that follows the arc of a circle of radius 18.4 m as in the figure shown below. (a) What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 9.24 m/s? (Neglect any ...
March 27, 2016

physics
Question Part Submissions Used A 3.25-kg object is attached to a vertical rod by two strings as shown in the figure below. The object rotates in a horizontal circle at constant speed 6.60 m/s. (a) Find the tension in the upper string. N (b) Find the tension in the lower ...
March 27, 2016

math
sandra brings cheese and crakers for lunch every 6 days, and lily brings cheese and crakers every 8 days. if they both brought cheese and crakers today, how many days will it be before both girls bring cheese and crakers again
March 24, 2016

Math
A customer at a restaurant receives a bill for \$43.20. The customer wants to leave a 15% tip
March 10, 2016

Math
The sum of three positive number is 30. The first plus twice the second plus three times the third add up to 60. Select the numbers so that the product of all three is as large as possilbe.
March 9, 2016

Math
A basket contains 6 oranges and 4 tangerines. A sample of 3 is drawn. Find the probability that they are all oranges.
March 8, 2016

Calculus Related Rates
A hot air balloon, 50 feet from an observer, is rising at 20 ft/sec. At 5 seconds after lift off 1. How fast is the distance between the observer and the balloon changing? 2. How fast is the angle of elevation changing?
March 1, 2016

Calculus
Two sides of a triangle are 2 meters and 3 meters and the angle between them is increasing at 0.5 radians/second when the angle is pi/4. 1. How fast is the distance between the tips increasing? 2. How fast is the area increasing? I got part of #1 but I am getting multiple ...
March 1, 2016

Calculus
Two sides of a triangle are 2 meters and 3 meters and the angle between them is increasing at 0.5 radians/second when the angle is pi/4. 1. How fast is the distance between the tips increasing? 2. How fast is the area increasing? I got part of #1 but I am getting multiple ...
February 29, 2016

math
Calculate the present value of \$1000 to be received at the end of 8years. Assume an interest payment rate of 5percent
February 29, 2016

math
How many cubes with 1/2 inch side lengths will fit inside a prism with a volume of 56 cubic inches? I'm thinking 112, since 56 * 2 =112, but I'm not sure if that's the right thinking.
February 26, 2016

math
How many cubes with 1/2 inch side lengths will fit inside a prism with a volume of 56 cubic inches? I'm thinking 112, since 56 * 2 =112, but I'm not sure if that's the right thinking.
February 25, 2016

history,geography,life science,maths literacy
two reasons why nursing is a suitable course
February 25, 2016

Calculus
Two sides of a triangle have lengths 8 m and 13 m. The angle between them is increasing at a rate of 0.08 radians /min. How fast is the length of the third side increasing when the angle between the sides of fixed length is π/3 radians. Please help I have been stuck on ...
February 25, 2016

cleveland
1/ 3xy^3 - 8/ 15x^2y
February 24, 2016

Math
The diameter of a normal front wheel on a bicycle is 24" Find the circumference and area of the front wheel?
February 24, 2016

maths lit, life sciences, visual arts and business
I'm not sure at the moment. Which courses could I study after high school?
February 22, 2016

maths lit, life sciences, visual arts and business
hi I am currently in grade 10 and I would like to know which courses are there for me when my subjects are maths literacy, business studies, visual arts and life sciences
February 22, 2016

Math
Formula. I = P x R x T. Is time is for 2 years do You \$10,000 x .15 x 2 (or 24 months)
February 22, 2016

physics
A bag of sugar weighs 3.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? N Repeat for Jupiter, where g is 2.64 times that on Earth. N Find the mass of the bag of sugar in kilograms at each of the three ...
February 21, 2016

Biology
what compounds (fats, starch, protein and simple sugar) do the following foods have? Oatmeal Margarine Salmon Whole milk Chocolate chip cookies Peach
February 20, 2016

Biology
what compounds (fats, starch, protein and simple sugar) do the following foods have? Oatmeal Margarine Salmon Whole milk Chocolate chip cookies Peach
February 19, 2016

Physics
A projectile is launched with an initial speed of 59.0 m/s at an angle of 32.0° above the horizontal. The projectile lands on a hillside 3.80 s later. Neglect air friction. (Assume that the +x-axis is to the right and the +y-axis is up along the page.) (a) What is the ...
February 17, 2016

algebra
Use the given zero to find the remaining zeros of the function. (hx)= 3x^4+5x^3+25x^2+45x-18; zero:-3i labe
February 10, 2016

alebra
Find the intercepts if any x^2+y^2+8x-8y-49=0 Labe
February 10, 2016

shelby
the boat launch shown is 32 meters longer than the rise of the ramp. The run is 31 meters longer than the rise. How long are the three sides of the ramp?
February 9, 2016

burns highs school
f(t) = −16t2 + 160t + 26 and the height in feet of the higher-traveling second flare is given by g(t) = −16t2 + 178t + 39, after t seconds.
February 7, 2016

physics
A 3.6-kg cat is sitting on the edge a merry-go-round that is spinning at 2.7 rad/s. The diameter of the merry-go-round is 5.6 m. How large is the static friction between the cat’s paws and the surface of the merry-go-round if it does not slip off?
February 6, 2016

Math
Can you show me how to do this problem: Find the missing dimensions of triangle XYZ. The info it gives me is side X has the number 2, Side Y has the letter m , and Z has the letter n. What do I do for this?
February 6, 2016

math
three taps fills water in a tank.one fills it in 3hrs another in 4hrs and the third in 6hrs.if all run together how soon will they fill the tank?
February 4, 2016

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