# Posts by tammy

Total # Posts: 677

**statistics**

You are designing a study to determine whether music has an effect on learning. Previous research indicates that the standard deviation to learn a task is 3.4 minutes. How many subjects would you need to ensure with 90% confidence that the estimate is within 1 minute of the ...

**statistics**

For a normal distribution with a mean of 140 and a standard deviation of 55 find each value requested. a. What is the minimum score needed to be in the bottom 10% of the distribution? b. What scores form the boundaries for the middle 75% of the distribution.

**College math**

1.Find the height to the nearest foot of a tree that makes a 50-foot shadow when a 2 ft. 6 in. pole is used to make a shadow of 3 feet.

**science**

A ball of mass m is attached by two strings to a vertical rod. as shown above. The entire system rotates at constant angular velocity about the axis of the rod. a)Assuming is large enough to keep both strings taut, find the force each string exerts on the ball in terms of , m...

**Basic Statistics**

Historically, the proportion of adults over the age of 24 who smoke has been estimated to be .30. You want to take a sample to estimate the current proportion of adults over the age of 24 who smoke within 3% at 95% accuracy. When you completed the sample you found that 114 of ...

**Math**

Solve for x: logx(121/64)= -2

**college algebra**

solve the logarithmic equation. Please show all work. log5x+log5(x-3)=log5(x+5)

**college algebra**

use properties of logarithms to find the exact value of the expression. sqrtlog81 3

**college algebra**

solve the equation below. Please show all work. log3(x/2-9)=4

**Physical science**

What is the force in newtons acting on a 5.7 kg package of nails that falls off a roof and is on its way to the ground?

**chemistry**

do the (*) mean multiple..or are you using them to separate the numbers??

**chemistry**

The energy levels the electron can occupy in the He+ ion can be calculated using the energy level equation. Calculate the frequency (Hz) of the photon emitted when the electron goes from a n= 4.00 energy level to a n= 3 energy level. Express answer in scientific notation.

**algebra**

(72÷(-4)+3(-4))/(5-(-5))

**algebra**

(72÷(-4)+3(-4))/(5-(-5))

**algebra**

(72÷(-4)+3(-4))/(5-(-5))

**phsyics**

The electric field intensity between two charged plates is 1.2 103 N/C. The plates are 0.030 m apart. What is the electric potential difference, in volts, between the plates?

**Englis**

She answered (sooner or soonest) of the ten people asked....Which do I use?

**scientific notation**

7.34 x 10^26 atoms of Cu is equivalent to how many moles of Cu? (Express to 3 sf)

**physics6**

F=F ma=ma 64 * a = 42 * 3.5 a= 147/64 = 2.29

**chem**

A steel cylinder of oxygen has a volume of 20.0 L at 22 degree C @ 35 atm. What is the volume @ STP? How many of oxygen are in the container?

**Chem**

20degree C solubility-22g CuSO4/100g H2O @ 20 degree C is 30g CuSO4/150g H2O saturated or un saturated?

**chemistry**

something connects a 16 resistor, 23 resistor, and 34 resistor in series and then connects the arrangement to a 36 v dc source. how much current is in the circuit?

**Chem**

if salt has the solubility product expression Ksp={Br3+}2{S2-}3 what is the equilibrium equation for the solubility?

**Chem**

@20 degree solubility-22g Cu SO4/100g H2O @ 20 degree C is 6g Cu SO4/25 g H2O saturated?

**Chemistry**

20 degrees C is 6 g Cu So4/25 g H2O is this saturated or unsaturated?

**physics**

a sailor pulls a boat along a dock by a rope held at an angle of 55.5 with the horizontal. How much work is done if the sailor exerts a force of 345 N on the rope and pulls the boat 23.8 m?

**chemistry**

When potassium chlorate is heated, it decomposes into potassium chloride and oxygen in the reaction 2KCIO3 -> 2KCI + 3O2. How much oxygen is liberated when 50 g of potassium chlorate is heated?

**college allgebra**

find only rational zeros f(x)=x^5-9x64+21x^3+11x^2-100x=100

**Science**

The biochemical conversion of Glucose, C6H12O6, into pyruvic acid, C3H4O3, is an important step in the TCA (Kreb’s) cycle which forms a part of the metabolic breakdown of glucose (to produce energy). C6H12O6 (s) + O2 (g) → 2C3H4O3(l) + 2H2O (l) glucose oxygen ...

**maths**

in a number of tests juan scored 42,54,63,42,78.What is the median mark

**Physics**

Hi Bob, Thank you for responding so quickly. And sorry to hear about your allergies. They are not fun! The exact question was : normalize the following functions in the interval 0 to infinity: a) e^-5x. The answer my instructor has is 10^1/2 e ^-5x as the answer but I don'...

**Physics**

Can someone please show me step by step how to normalize e^-5x in the interval (0, infinity)? I have read a lot of different books etc but need it explained to me in plain English or showed to me step by step because I am just not getting it. Thank you

**english**

find the oject and preposition in this sentence. a chimney sweep uses a long brush to clean soot from the inside of a chimney.

**Biology**

is the reaction of calcium chloride with sodium carbonate ionic or covalent

**Physical chemistry**

help! I am trying to figure out how to convert from equation one to equation two. I have spent two hours on this and cannot figure it out. I would greatly appreciate if someone could help me out on this. Equation1: v= sqr root (3RT/M) with R being the molar gas constant, M ...

**ETH/125 - CULTURAL DIVERSITY**

List two to three characteristics of Orientalism. How may Orientalism and prejudice contribute to hate crimes against these groups?

**algebra**

If a baseball player hits a homerun and runs the bases, what is his displacement?

**algebra**

Thank you for you answer Ms Sue.

**algebra**

Iam wanting help i do not want you to do it for me. I just needed it broken down in order to answer Thank you for your help.

**algebra**

3. Moving Costs Moving company A charges $80 plus $55 an hour to move households across town. Moving Company B charges $75 an hour for cross-town moves. For what lengths of time is Moving Company B more expensive than Moving Company A? Write an inequality and solve for time t...

**math**

at a local restaurant 45% of the customers order spaghetti. Estimate the probability that 6 of the next 10 customers will order spaghetti.

**history**

what were vietcong hideouts?

**Business Finance**

The new credit manager of Kay's Department store plans to liberalize the firm's credit policy. The firm currently generates credit sales of $575,000 annually. The more lenient credit policy is expected to produce credit sales of $750,000. The bad debt losses on ...

**history**

Describe Rosa Parks in one paragraph

**Algebra**

if p-28=10/3(h-5) how in the world do I figure out how many pounds of oranges a 18ft & 20 ft tree would make. I can get this far and just can catch onto the rest. Please help!

**Social STUDIES**

3 1 2 5

**Math**

Which one is a function? {(7,5),(-6,0),(2,3)} {7,-6,2,-7} I think its the first one.

**Algebra**

Factor the following expression completely: 36^3-16x

**Algebra**

Express in terms of i:2√-36

**Algebra**

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this: 4x + 4y = -36, 4x + 4y = 12

**Algebra**

If a stone is tossed from the top of a 290 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 290, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest ...

**Algebra**

Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions. x2 = 3x – 6

**algebra**

if the length of a triangle is 31 find a new parameter if the width is 5 less than one half the length

**computer science**

Input a list of positive numbers (terminated by 0) into an array, find the mean (average) of the numbers in the array, and output the result. Use a subprogram to input the numbers, a function to find the mean, and a subprogram to output the result.

**Algebra**

write an equation of the line containing the given point and parallel to the given line (2,-4); 8x-3y=2 the equation of the line is y=

**Algebra**

the formula I'm suppose to be using is y-y1=m(x-x1) m=4/5 (7,-8) I don't understand your answer

**Algebra**

Find an equation of the line having the given slope and containing the given point. M=4/5, (7,-8) I can totally due the equation y+8=4/5x-28/5 but keep getting the answer wrong. I cannot figure out how subtracting 8 they get the answer y=4/5x-68/5 PLEASE HELP!

**statistics**

A researcher wants to estimate the average time (in minutes) spent in a car daily. This will be done by randomly surveying 300 individuals and calculating the sample mean. Find the probability that the estimate will be in error by less than 5 minutes. Assume that the ...

**Chemistry**

If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.91 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) → 2 CaSO4(g) + 2 CO2(g)

**American Government**

The president's constitutional roles,such as chief executive and commander-in-chief:

**calculus**

I need help with this calculus problem. H(S)=S/(1+S) If F 1/2, -1/2 & (a+1)? I can't figure out what this mean /?

**Com/155**

Does this look better? I was extremely irresponsible in my younger years. I was not fully educated with credit card debt. The debt added up much faster than expected. The interest rates were extremely high. The financial class has helped me fully understand my finances. With ...

**Com/155**

I am so confused. Is this correct? extremely, extremely, fully, sparingly = adverb younger, credit, card,much, faster, interest, financial, important, credit = Adjective

**Com/155**

extremely, extremely, fully, sparingly = Adj younger, credit, much, faster, interest, financial, important, credit = Adv

**Com/155**

Can some one check these for correct advebs and adjectives. I was extremely irresponsible in my younger years. I was not fully educated with credit card debt. The debt added up much faster than expected. The interest rates were extremely high. The financial class has helped me...

**Math**

156 x 29/39 x 1/16

**Math**

Thank-You

**Math**

3/17x=12

**Math**

I get... .1q-1.5=0.9q-3.2 .1q-1.5-0.9q=0.9q-3.2-0.9q -.8q-1.5+1.5=-3.2+1.5 -.8q=-1.7 -2.125 Just doesn't look right

**Math**

4.5q-1.5-4.4q=0.9q-3.2

**physics**

A coil with 210 turns, a radius of 5.2 cm, and a resistance of 11 ohms surrounds a solenoid with 160 turns/cm and a radius of 4.6 cm . The current in the solenoid changes at a constant rate from 0 to 6.4 A in 0.11 s. Calculate the magnitude of the induced current in the coil.

**pharmacy**

What patient issues might arise when working in an institutional pharmacy setting?

**Algebra**

-8y+1=-9y+2

**Math**

Thank You

**Math**

x + 5/8 = - 1/4

**Com 155**

To the person who said they should be ashamed: they are not looking for answers, they're just looking for help. No one wrote the answer for them. They just came on here to get a second opinion. This is why people should mind their own business. You have no idea what you&#...

**accounting**

Would like to start a college fund. It was estimated that the cost for college to be 60,000 per year. How much should be deposit into the account each month for 18 years to accumulate a total of 240,000 @ 12% interest earned.

**Algebra**

x+1/6=-2/3 solution set?

**Math**

From an 8 inch by 10 inch rectangular sheet of paper, squares of equal size will be cut from each corner. The flaps will then be folded up to form an open-topped box. Find the maximum possible volume of the box.

**Chemistry I**

iF THE THEORETICAL YIELD IF A REACTION IS 0.121G AND THE ACTUAL YIELD IS 0.112G WHAT IS THE PERCENT YIELD

**mythology**

do the ancient myths provide us with any clues to the rise and fall of large companies such as Enron, Exxon and BP.

**Math**

The length of a rectangle is fixed @ 21 cm, what widths will amke the perimeter greater than 78cm?

**health**

Why risky sex is a serious matter?

**Health**

Development of male genitals before birth is due to what?

**Physics**

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula. Some of them make ...

**Physics**

According to conservation of momentum, when two objects collide, the momentum lost by one object equals the momentum gained by the other. Give a common-sense, non-mathematical explanation of the connection between Newton’s 3rd law and momentum conservation. In other words...

**Physics**

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula. Some of them make ...

**english**

Janet left fingerprints on the glass, the detectives were able to solve the crime

**Physics**

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula. Some of them make ...

**Physics**

According to conservation of momentum, when two objects collide, the momentum lost by one object equals the momentum gained by the other. Give a common-sense, non-mathematical explanation of the connection between Newton’s 3rd law and momentum conservation. In other words...

**Math**

a patch of dirt needs 3 5/6 ft of sod to cover it. If Nick decides to cover only 3/4 of the dirt, how much sod does he need?

**algebra**

8x^2 + 5x = 15 + 3x

**History**

Thanks it helped alot. Tammy

**History**

The evolution of the socio-political milieu during the colonial period, including Protestant Christianity's impact on colonial social life. Can any one give me some insite? Tammy

**History**

Does anyone know how to create a timeline tracking the major themes/paradigm shifts in American History. I am not sure what the format for a Timeline. Tammy

**Pre Algebra**

142-187

**Math**

Yes

**History**

I know that the Pertains went to the New World and that the colonization was based on freedom of religion and freedom for the people. But I don't know how the Reformation in Great Britain affected the colonies. Tammy

**History**

How did the Reformation in Great Britain affect the colonization of the New World?

**math**

None of the choices have the right answer