# Posts by Sam

Total # Posts: 5,188

**Physics**

An engine rated at 5.0x10^4 watts exerts a constant force of 2.5x10^3 newtons on a vehicle.determine the average speed of the vehicle.

**calculus**

The volume V, in liters, of air in the lungs during a two-second respiratory cycle is approximated by the model V = 0.1729t + 0.1522t^2 − 0.0374t^3, where t is the time in seconds. Approximate the average volume of air in the lungs during one cycle. (Round your answer to...

**PHYSICS HELP Harmonic Motion**

A 32.0 kg block at rest on a horizontal frictionless table is connected to the wall via a spring with a spring constant k= 32.0 N/m. A 2.00E-2 kg bullet travelling with a speed of 5.500E+2 m/s embeds itself in the block. What is the amplitude of the resulting simple harmonic ...

**Math**

Candy bars sold for three weeks.. Sold 26 candy bars first week Second week sold 4 less than 2 times the number of candy bars sold during girst week Third week sold 6 more than 1.5 times thenumber sold in second week

**calculas 1**

Find the value(s) of c guaranteed by the Mean Value Theorem for Integrals for the function over the given interval. (Enter your answers as a comma-separated list.) f(x) = x^9, [0, 9]

**calculas 1**

1 to 2 5 interval

**calculas 1**

Use upper and lower sums to approximate the area of the region using the given number of subintervals (of equal width). (Round your answers to three decimal places.) y = 7/x number of interval between are 5 upper sum= lower sum=

**Calculus**

Use the Midpoint Rule with n = 4 to approximate the area of the region bounded by the graph of the function and the x-axis over the given interval. f(x) = x^2 + 4x, [0, 4]

**calculas**

Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the x-axis over the given interval. (Round your answers to four decimal places.) g(x) = 7 sin x, [0, π], 6 rectangles...

**calculas 1**

A child places n cubic building blocks in a row to form the base of a triangular design (see figure). Each successive row contains two fewer blocks than the preceding row. Find a formula for the number of blocks N used in the design. (Hint: The number of building blocks in the...

**Stat**

An SRS of size n is taken from a large population whose distribution of income is extremely right-skewed and the mean income is calculated. Which of the following statements is false? a) When n > 30, the sampling distribution of is approximately normal. b) When n increases...

**math-**

(-2, -16) (-1 , -6) (0 , 4) (1 , 14) (2 , 24)

**Statistics**

An unprepared student is about to take his first test of the semester. He is told that his test will be composed of 20 multiple choice questions, each with 4 possible answers, only one of which is correct. a.What is the probability that the unprepared student randomly guesses ...

**Art**

It was C

**Art**

1. Why would knowledge of mathematics be useful to an architect? A Help the architect to determine the best building site B Help the architect to determine the best building materials C Help the architect to determine measurements of building materials D Help the architect to ...

**calculus upward@miss reiny**

upward...

**calculus too hard help**

if y=x^x^x^x... dy/dx=? plz show working thanks got no ideal at all

**Physics**

If an electron has a total energy of 5.6 MeV, how would I find the kinetic energy and momentum??

**Plane trigonometry**

Hi, could you help me solve the one cycle graph and the 5 points of this equation: Y=2sin pi(x+1/2)+1 thank you in advance!

**Algebra**

"The table shows how far Object 1 traveled as a function of time. ___________________________________ Time (sec)| Distance Traveled (ft) x | y ___________________________________ 2 | 18 4 | 36 6 | 54 8 | 72 ___________________________________ The equation shows how far ...

**Algebra**

"Explain how you can tell the function f(x) = |x - 5| is not linear by using points on its graph. Make sure to include in your answer the Points you used to determine that the function is not linear." Help please?

**Data Analysis**

A) An insurance company wants to estimate the proportion of people unsatisfied with their new telephone help service. A survey of 200 callers revealed 45 were unsatisfied with the service. Construct by hand a 95% confidence interval for the proportion of unsatisfied customers...

**Data Analysis**

A manufacturing company wishes to estimate the number of items that its workforce can produce on average each hour now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past month. The hourly production rates for these 8 ...

**Algebra**

In an expedition to seize his enemy's elephants, a king marched 2 yojanas the first day. Say, intelligent calculator, with what increasing rate of daily march did he proceed, since he reached his foe's city, a distance of 80 yojanas, in a week?

**algebra**

if 1, 2, 7 and 20, respectively, are added to the first terms of an arithmetic progression, a geometric progression of four terms is obtained. find the first term and common difference of the arithmetic progression the answers are both 3 .. but i don't know the solution, ...

**Literature**

This quote from “I Hear America Singing” by Walt Whitman shows the poem is what kind? A. Lyric B. Haiku C. Couplet D. Sonnet

**Physics**

How much heat is required to change a 35.8 g ice cube from ice at -12.7°C to water at 45°C? (if necessary, use cice=2090 J/kg°C and csteam= 2010 J/kg°C)How much heat is required to change a 35.8 g ice cube from ice at -12.7°C to steam at 113°C?

**Physics**

The latent heat of vaporization of H2O at body temperature (37.0°C) is 2.41E+6 J/kg. To cool the body of a 76.7 kg jogger [average specific heat capacity = 3540 J/(kg*°C)] by 1.90°C, how many kilograms of water in the form of sweat have to be evaporated?

**Physics**

A 0.300 kg iron horseshoe that is initially at 550°C is dropped into a bucket containing 19.4 kg of water at 21.1°C. What is the final equilibrium temperature (in °C)? Neglect any heat transfer to or from the surroundings. Do not enter units. I'm taking (...

**life orientation**

six ways in which human rights violation influences individuals

**Data Analysis**

A firm produces batteries that have a lifetime which is normally distributed with a mean of 360 minutes and a standard deviation of 30 minutes. The firm needs to keep an eye on the production process to ensure that everything is working properly and that batteries are not ...

**Chemistry**

Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Delta Srxn < 0 or Delta Srxn > 0. Why is it Delta Srxn < 0 ?

**Physics**

If the average gauge pressure in the artery is 1.41E+4 Pa, what must be the minimum height, h of the bag in order to infuse glucose into the artery? Assume that the specific gravity of the solution is 1.04.

**Math**

-4+12 /(-3) 10+3(-2)=

**AP Chemistry**

Consider the following reaction: PbCl2 + 2 NaOH → Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+ ions, Cl− ...

**us history**

For some reason I though it was A at first but i agree with D

**English composition 1**

Read “Letter from Birmingham Jail” by Martin Luther King, Jr. 2. Write the introduction for an essay that critically analyzes “Letter from Birmingham Jail” for the presence of persuasive techniques. 3. Label the major parts of your introduction: a. Hook b. ...

**math**

@ms.sue

**math**

a vase is in the shape of a cone that is 10 inches tall with a diameter of 3 inches. what is the greatest amount of water the vase can hold a.) 23.56 in.^3 b.) 54.72 in.^3 c.) 70.65 in.^3 d.) 94.25 in.^3

**Personal Finance**

Wait it's B

**Personal Finance**

One aspect of financial planning is to make sure you maintain adequate insurance coverage for your needs. Which aspect of financial planning does this deal with? A. Retirement and Estate Planning B. Spending C. Managing Risk D. Investing Would it be D?

**math**

A can of soup is in the shape of a cylinder with a radius of 3.2 centimeters and a height of 10.2 centimeters. The label covers the entire lateral surface of the can. What is the approximate area of the label? a.) 32.64 cm^2 b.) 64.34 cm^2 c.) 205.08 cm^2 d.) 269.42 cm^2

**Math**

Fksb

**calculus**

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go? (Round your answer to two decimal places.)

**Analytical chemistry**

an 0.5031 gram sample of iron ore is determined through redox titration using K2Cr2O7. The sample was dissolved in HCl and all the iron was converted to the 2+ state. Titration to the endpoint required 24.34 mL of 0.01887 mol/L K2Cr2O7. Calculate the amount of Fe2O3 as a ...

**Math**

Sally is filling glass containers in the shape of cylinders with different colors of sand. Each cylinder has a radius of 4 inches and a height of 8inches. Sally has 1,000 cubic inches of sand. How many containers can she fill completely.? plz I really need help on this question.

**ela connections academy lesson4 unit 3**

What class

**calculus**

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go? (Round your answer to two decimal places.)

**calculus**

The maker of an automobile advertises that it takes 15 seconds to accelerate from 15 kilometers per hour to 70 kilometers per hour. Assuming constant acceleration, (a) The distance the car travels during the 15 seconds (Round your answer to two decimal places.)

**calculus**

Use a(t) = -32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go? (Round your answer to two decimal places.)

**calculus**

Consider a particle moving along the x-axis where x(t) is the position of the particle at time t, x'(t) is its velocity, and x''(t) is its acceleration. A particle moves along the x-axis at a velocity of v(t) = 5/√t, t > 0. At time t = 1, its position is x...

**calculus**

Use a(t) = −9.8 meters per second per second as the acceleration due to gravity. (Neglect air resistance.) A canyon is 2300 meters deep at its deepest point. A rock is dropped from the rim above this point. Write the height of the rock as a function of time t in seconds...

**calculus**

Use a(t) = -9.8 meters per second per second as the acceleration due to gravity. (Neglect air resistance.) A baseball is thrown upward from a height of 3 meters with an initial velocity of 7 meters per second. Determine its maximum height. (Round your answer to two decimal ...

**calculus**

Find the particular solution that satisfies the differential equation and the initial condition. f ''(x) = x^2, f '(0) = 8, f(0) = 8 f (x) = ?

**Pre cal**

sin55=12/b what is b

**Pre cal**

A right triangle sides is 7 and 4 find the hypotenuse

**Stats**

8.0235% of the employees of the Acme Tire store are enrolled in a 401k at the store. If the company has 600 employees, what is the probability that less than 40 employees are entered in the 401k.

**Stats**

8.0235% of the employees of the Acme Tire store are enrolled in a 401k at the store. If the company has 600 employees, what is the probability that less than 40 employees are entered in the 401k.

**calculus**

Find the length and width of a rectangle with maximum area that has a perimeter of (7P) units. units (smaller value) units (larger value)

**calculus**

Find the absolute extrema of the function (if any exist) on each interval. (If an answer does not exist, enter DNE.) f(x) = square root of (25 − x^2) (a) [−5, 5] minimum (x, y) = (smaller x-value) (x, y) = (larger x-value) maximum (x, y) =

**college algebra**

The electrical resistance of a wire of a given material varies as its length and inversely as the square of the diameter. if a wire 300 feet long and 0.05 inches in diameter has a resistance of 30 ohms, (a) find the resistance of a wire which is 1000 feet long and 0.02 inch in...

**math (ms sue)**

Suppose that one voter in the 2010 UK General Election was selected at random. The probability that the person voted for the Conservative Party was 0.36, the probability that the person voted for the Labour Party was 0.29, and the probability that the person voted for the ...

**Science**

You are correct. I had the same answer on my test.

**History**

which of the following was a significant part of the civil rights movement? a.) the civil rights movement got national attention. b.) laws were passed as a result of the civil rights movement. c.) the president provided support of the civil rights movement. d.) all of the ...

**Maths**

A positive two digit number is divided by the sum of its digits. What is the smallest and largest the result can be?

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its courseness is such that is forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of ...

**Math**

A survey about the student government program at a school finds the following results. 190 students like the program 135 students think the program is unnecessary 220 students plan on running for student government next year. If a circle graph were made from this data, what ...

**math**

Thanks Ms Sue

**math**

Find the volume of a rectangular box having width 4.0 ft, length 6.074 ft, and height 8.721 ft. Answer is 211.89 ft

**Calculus Related Rates**

Two sides of a triangle are 5 and 8 and the angle between them is increasing at .05 rad/sec. how fast is the distance between the tips of the sides increasing when the angle is pi/4

**Calculus Related Rates**

A balloon is 70 feet from an observer which is rising at 15 ft/sec. At 5 seconds after lift off, how fast is the angle of elevation changing?

**Geometry**

A fish tank with a rectangular base has a volume of 4,320 cubic inches the length and width of the tank are 15 inches and 12 inches .find the height in inches of the tank

**Math**

the answer is 13 &1/4

**Math**

Perform the operation. 8 & 1/2 +5 & 1/8

**Math**

It is A trust me

**Life orientation**

Identify three courses or study fields I'm interested in following after grate 12 write them down and in order of preferences provide two reasons of each choice

**Physics**

A pool ball of mass 100g and velocity [5,-4]m/s collides with a stationary pool ball of the same mass. After the collision, the pool balls have velocites [2,-3]m/s and [3,-1]m/s. Is the collision elastic? Explain your answer.

**Physics**

A pendulum bob has a mass of 1kg. The length of the pendulum is 2m. The bob is pulled to one side to an angle of 10degree from the vertical. What is the velocity of the pendulum bob as it swings through it's lowest point? What is angular velocity?

**Physics**

A ball of mass 500g is kicked into the air at angle of 45degree. It reaches a height of 12m. What was it's initial velocity?

**science**

If a sheet of Tarpaulin (350gsm) 5m high 7m wide at a pitch of 45% with wind speed of 60mph what will be the upwards force (lift force)in Kg?

**MAth**

projectile is fired from the ground s=0 ft with initial speed of v=800 ft/sec at an angle of elevation 30 degrees State the vector function the projectile follow,projectile initial velocity vector,vector function,projectile speed function

**Math**

Look for a pattern and find the next two numbers in the sequence and then write a general version of the nth term. 1 2 3 4 5 6 7 8 n 18 30 42 54 66 78 I can recognize the pattern as being + 12 so under 7 my answer would be 90 and under 8 my answer would be 102, but how do I ...

**Math**

Look for a pattern and find the next two numbers in the sequence and then write a general version of the nth term. 1 2 3 4 5 6 7 8 n 18 30 42 54 66 78 I can recognize the pattern as being + 12 so under 7 my answer would be 90 and under 8 my answer would be 102, but how do I ...

**worldhistory 6th grade**

it is c trust me i took then test

**math.**

Write a function of x that performs the following operations: Raise x to the ninth power, multiply by 5, and then add 6. y=f(x)= (b) Find the inverse to the function you found in part (a). x=g(y)=

**physics**

Consider the system shown in the diagram. The pulley is a uniform cylinder with mass m3 = 0.60 kg and radius R = 4.0 cm, the other two masses are m1 = 2.5 kg and m2 = 1.0 kg, and á = 30o. Assume the rope is massless, there is no slipping of the rope on the pulley, and ...

**Chemistry**

Concentrated hydrochloric acid is 12 M. What is the molarity of an HCl solution prepared by diluting 10.0mL of concentrated acid to a total volume of 250.0mL?

**Chemistry**

How much concentrated 12 M HCl is needed to prepare 200 ml of a 2.5 M solution?

**Social Studies**

Is it D

**Social Studies**

I think it is the 3rd one i am not forsure

**Social Studies**

Why did democracy develop during the Roman Republic? Members of lower social classes began to demand representation in government. Romans wanted to prevent one leader from gaining too much power. Romans wanted to model their system of government after ancient Athens. Members ...

**Social Studies**

thank you

**Social Studies**

Which of the following is a example of how the government of the roman republic contribute to the democratic? It was based on a Dictatorship It was based on a tripartite system It was based on a triumvirate system It was based on a written set of laws I think it is the second one

**math**

7ft board is to be cut into three pieces, two equal-length ones and the third 99 in. shorter than each of the other two. If the cutting does not result in any length being lost, how long are the pieces?

**Physics**

A soccer ball of mass 550g is at rest on the ground. The soccer ball is kicked with a force of 108N. The player shoes is in contact with the ball for 0.3m. What is KE of the ball? What is the ball's velocity at the moment it loses contact with the soccer player's shoes?

**Math**

JASON DRIVES 50 MI TO A TRAIN and then continues his trip with a 210 mi train ride. the car travels 20 mph slower than the train. if total travel time is 4 hr, find the average speed of the car and the average speed of the train.

**math**

Given that f(x)=4x−3 and g(x)=4−x2, calculate f∘g(x)= g∘f(x)= THANKS

**Physics**

Rosie (mass 41 kg) pushes a box with a horizontal force of 140 N (31.472 lb) at a speed 25 m/min. A. What is Rosie’s power output? Answer in units of W. B.What energy is produced by a 300 W lightbulb lit for 4.1 hours? Answer in units of J

**Physics**

Zak, helping his mother rearrange the furniture in their living room, moves a 42.3 kg sofa 7.2 m with a constant force of 17 N. A. What is the work done by Zak on the sofa? Neglect friction. Answer in units of J. B. What is the average acceleration of the sofa? Answer in units...