# Posts by MAry

Total # Posts: 3,806

**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*

**Statistics**

.2

*September 10, 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*

**science**

Nebular Theory

*August 31, 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*

**counseling**

D: All of the above

*July 24, 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**

PLEASE HELP ME TO WRITE A PEOM ABOUT GIVERS NEVER LACK

*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*

**Language Arts (Check My Answers**

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*

**Social Studies (check my answers)**

Would number 2 be A?

*June 2, 2016*

**Social Studies (check my answers)**

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*

**Social Studies (check my answers)**

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**

My answer is A

*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*

**Math**

1 hour

*February 8, 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*