# Posts by mariah

Total # Posts: 247

**Statistics**

Consider a t distribution with 30 degrees of freedom. Compute P(t "greater than or equal to" -1.50). Round your answer to at least three decimal places. Consider a t distribution with 6 degrees of freedom. Find the value of c such that P(-c <t<c)=0.95. Round ...

**Physics 202-help**

If we have just counted 15 seconds between the lightning and thunder, how far away do we predict the center of the thunderstorm to be using the 3 second rule and What was the percent difference between the prediction and the real distance of the thunderstorm? The speed of ...

**Math**

What is the greatest odd number less than 250 ? Exlplain how you know.

**algerba**

Coco has a jar containing pennies and nickles. There is $9.20 worth of coins in the jar. If she could switch the number of pennies with the number of nickles, there would be $26.80 worth of coins in the jar. How many pennies and nickles are in the jar?

**Math**

The distance between bills house and his aunt house is 835 miles. About how many miles would he drive if he made. 4 one-wat trips

**math**

A relief package is released from a helicopter at 1600 feet. The height of the package can be modeled by the equation h(t)= -16t^2+1600 where h is the height of the package in feet and t is the time in seconds. The pilot wants to know how long it will take for the package to ...

**Chemistry**

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction?

**Chemistry**

All the following are necessary parts of a neutralization reaction except A) an acid B) an indicator C) water D) a salt.

**Chemistry**

What is theoretical yield in grams of CO2 formed from reaction of 3.12g CS2 and 1.88g O2?

**Chemistry**

thanks @ DrBob222

**Chemistry**

The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temperature from 20°C to 21°C?

**Chemistry**

Balance both the atoms and charges of the following chemical equation: Ce4+ + S2 −→ Ce3+ + S This is what I came up with: 3Ce4+ + S2 −→ 4Ce3+ + 2S

**Chemistry**

Given the balanced neutralization equation: H2SO4+2KOH→K2SO4+2H2O How many moles of potassium hydroxide (KOH) are required to neutralize 4.5 mol of sulfuric acid (H2SO4)? Assume that the sulfuric acid completely dissociates in water. 2 mols of KOH = 1 mol of H2SO2 4.5 ...

**Physics**

Why do you think this is so?(Select all that apply) 1.Each resistor only uses up part of the energy, but together they use all of it. 2.Each resistor only uses up part of the current, but together they use all of it. 3.Each resistor uses up the same current. 4.Each resistor ...

**Physics**

a)In the series circuits, what do you notice about the voltage across each resistor compared with the voltage of the battery? (There could be more than one answer) 1.The resistor voltages multiplied together give the battery's voltage 2.The resistor voltages subtract to ...

**Mathematics**

Nina is correct thanks

**Social Studies**

Which of the following most contributed to the rise of Sumer? A. Farming** B. Military Power C. Isolated location D. Trade You are a young woman in Saudi Arabia. Which of these should you not plan to do? A. Apply for a job outside the home** B. Take a test for a drivers ...

**Math**

Company A charges $11 per month plus $0.05 per minute, while company B charges $0.15 per minute with no monthly charge. For how many minutes will the monthly cost be the same??

**5 QUESTIONS PLZ HELP!**

1) which of the following numbers are equivalent to 20%?(Choose all that apply)(only 2) A. o.oo2 B. 1/4 C. 0.20 D. 1/5 2)which of the following numbers are equivalent to 35%?(choose all that apply)(only 2) A. 7/20 B. 6/20 C. 3.5 D. 0.35 3) which of the following numbers are ...

**Setswana**

kgwebo e e tlhakanetsweng e gaisa ya motho a le esi(tlhamo)

**Science**

can you help me in mater and energy

**Physics**

A boulder is raised above the ground so that the ground is 200j . Then it is dropped. What is its kinetic energy before it hits the ground?

**Physics**

A 91 kg man stands on a spring scale in an elevator. Starting from rest, the eleva- tor ascends, attaining its maximum speed of 1.7 m/s in 1.07 s. It travels with this constant speed for the next 5 s, undergoes a uniform negative acceleration for 1.67 s, and comes to rest. ...

**Physics**

Include units with all of your answers. A 1.84 kg bucket full of water is attached to a 0.76 m long string. a. If you swing the bucket in a vertical circle, what is the minimum speed you must swing it so the water does not fall out at the top of the circle? b. What is the ...

**Lafayette**

How do you model 624 without using tens

**Physics**

A child and sled with a combined mass of 45.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of 8.0 m/s at the bottom, what is the height of the hill (include units)?

**Physics**

The 3.1 kg box shown below slides with a constant speed down an incline at an angle of θ = 28.0° to the horizontal. What is the coefficient of kinetic friction?

**Health**

70%

**Physics**

A cargo plane is moving with a horizontal velocity of vx = +223 m/s at a height of y = 980 m above level ground as shown in the figure below when it releases a package. Ignoring air resistance, how much time will it take the package to reach the ground? (Express your answer to...

**Math**

B. 2x+5

**Physics**

The Asian Silver Carp is an invasive species of fish which has infested a number of American rivers. The disturbance of passing boats has been known to make these fish leap large distances out of the water. One such fish leaps with an initial velocity at the water's ...

**Physics**

The place kicker on a football team kicks a ball from ground level with an initial speed of 22.40 m/s at an angle of 15.0° above the horizontal. How far does the ball travel in the x-direction before it lands on the ground again? You may neglect air resistance.

**Chemistry 151**

How many moles of chloride ions are in 0.2580 g of aluminum chloride?

**Math**

John invested his savings in two investment funds. The amount he invested in Fund A was $8000 less than the amount he invested in Fund B. Fund A returned a 4% profit and Fund B returned a 8% profit. How much did he invest in Fund B, if the total profit from the two funds ...

**Basic Dressmaking Processes**

1. In order to produce a professional-looking garment, pressing should be done A. at each process. B. only when the garment is complete. C. just on the right side of the fabric. D. quickly and with a light touch. 2. A wooden clapper is used to A. hold an ironing board steady. ...

**math**

at a park 96 brown bag lunches were given out in thirty minutes if 29 bags remain and x represents the starting number of brown bag lunches which equation could be used to determine the value of x

**math**

is the area of ANY triangle 1/2 b x h ?

**math**

1,800

**math**

Warren measured a recentangular window to find Out how much plastic he would need to cover it.The window measured 5ft 6 inches by2ft9inches.about how many square inches of plastics does Warren need to cover the window?

**math**

Between 6a.m.and 10a.m.the temperature rose by 5°f.between 10a.m.and 2p.m.the temperature rose by 6°f.between 2p.m.and 6p.m.the temperature rose by 0°c.would you be able to tell how much the temperature rose since 6a.m?

**Math**

the perimeter if a rectangle is 42 centimeters. the lenght of a rectangle can be represented by (x+4), and its width acn be represented by (2x-7). what are the dimensions of this rectangle in centimeters?

**Chemistry 2**

The equilibrium constant, Kc, for the following reaction is 1.54E-2 at 643 K. 2HI(g) H2(g) + I2(g) When a sufficiently large sample of HI(g) is introduced into an evacuated vessel at 643 K, the equilibrium concentration of I2(g) is found to be 0.351 M. Calculate the ...

**Chemistry 2**

The equilibrium constant, Kc, for the following reaction is 1.54E-2 at 643 K. 2HI(g) H2(g) + I2(g) When a sufficiently large sample of HI(g) is introduced into an evacuated vessel at 643 K, the equilibrium concentration of I2(g) is found to be 0.351 M. Calculate the ...

**Tulane University**

Frank and Oswalt report a molar absorptivity of 4700 L mol^-1 cm^-1 for thiocyanatoiron(lll) ion. What absorbance would you expect for a soloution that it 1.0e-4 M in thiocyanatorion(lll) ion, if the path length is 1.00 cm?

**Computers**

abby is wrong i got a 1/3 like becca, none of you guys are right the answer is... B C A

**Physics**

A contestant in a winter games event pushes a 59.0 kg block of ice across a frozen lake as shown in the figure below. The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03. The block is being pushed at a direction of 23 degrees below the ...

**AP Chemistry**

the answers for #1 is 1)F 2)F 3)T 4)F 5)T Ive just got done working in this problem

**Chemistry (Gen Chem 1)**

Assume diameter of a neutral helium atom is 1.40x10^2pm. Suppose that we could line up helium atoms side by side in contact with one another. How many atoms would it take to complete the distance of 6.70cm from end to end?

**Math**

Yes because 4 2-5. Is a whole number plus four

**English**

Which poetic line contains both paradox and consonance? One summer day, all day I drove it hard How long it might last, how young it might be Ay, look, and he'll smile thy gloom away At least to know the worst is sweet

**chemistry**

A 0.248 M ZnCO3 solution is made from 21.4 g of solute? What is the volume of the solution?

**Math**

The inflection point of the curve y = x4 − 8x3 + 24x2 + 7x − 3 is? So I got (1,21) I was wondering if this is correct because sometimes I will be doing something completely wrong and not even realize it.

**chemistry**

How many grams of O2 are contained in a 25.0L sample at 5.20 atm and 28.0C?

**physics**

A bush baby, an African primate, is capable of leaping vertically to the remarkable height of 2.3 m. To jump this high, the bush baby accelerates over a distance of 0.14m while extending the legs. The acceleration during the jump is approximately constant. -What is the ...

**physics**

Heather and Jerry are standing on a bridge 53m above a river. Heather throws a rock straight down with a speed of 12m/s . Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time elapses between the first ...

**Algebra**

11 836/1000

**Trigonometry**

The depth d in feet of the water in a bay at is given by d(t) = 3/2 sin (5πt/31) + 23 where t is time. Graph the depth of the water as a function of time. What is the maximum depth of the water to the nearest tenth of a foot? (Enter only the number.)

**science**

Yeah, it's definitely A.

**Trigonometry**

I was thinking that was the answer, but I just wasn't sure if those pi's were going to cancel out. Thanks for the confirmation! :)

**Trigonometry**

A little confused on this one... Find the amplitude and the period of h(x) = 1/2 cos (-πx).

**Trigonometry**

I think I got the answer. I did 1/0.004 and got 250 hz.

**Trigonometry**

Sorry, I just wanted to make my question more clear.

**Trigonometry**

I know we multiply 2pi times coefficient. In this case, I guess I am asking what that is.

**Trigonometry**

Ohh, I see. So, you would multiply 2 x pi x 3 or x 0.004? What is k equal to?

**Trigonometry**

Use a sine function to graph a sound wave with a period of 0.004 of a second and an amplitude of 3 cm. Find the frequency in hertz for this sound wave. (Enter only the number.)

**Trigonometry**

Thank you, Steve! :)

**Trigonometry**

Identify the amplitude and the period of the function c(x) = 3cos (x + π).

**Trigonometry**

Solve for θ in the equation cos θ = -0.181 when 180º < θ < 360º. Round your answer to the nearest tenth of a degree.

**Trigonometry**

A painter wants to lean a 30-foot ladder against a wall. Safety guidelines recommend that the distance between the base of the ladder and the wall should be 1/4 of the length of the ladder. To the nearest degree, what acute angle should the ladder make with the ground? Enter ...

**Communication**

Question 1. 1. Which of the following guidelines are most correct regarding rules for responding to self-disclosure? (C) Respond back immediately, support the person disclosing, and listen critically. Listen critically, never use the disclosure against the other person, don&#...

**Math**

878999

**government**

He believed everybody should earn the same no matter their social class .

**algebra**

1. Kevin ran 3 miles less than Steve ran. The sum of their distances is 21 miles. How far did Steve run? The domain of the solution is {0, 10.5, 12, 18}.

**geometry**

if a polygon has a volume of 19 cm and is dilated by a factor 3\2 , what will be the volume of the dilated polygon

**computer literacy**

1. Which of the following options would return a true statement for the sentence: The sky is bluest early in the morning. (A) Sky and blue Sky not morning Sky or dark Sky and evening 2. Famed science fiction writer H. G. Wells once envisioned something to store vast amounts of...

**Computer Literacy**

2. Which of the following components was a significant development featured in the Macintosh LISA computer? (C) C Prompt Disk Operating System Graphical User Interface) Memory 4. Which is NOT a function associated with a motherboard? (D) Expansion slot Memory Processor ...

**Computer Literacy**

Question 2 is C Question 4 is D Question 10 is B

**Computer Literacy**

1. Which vendor did IBM select to create the operating system for the IBM PC? (A) Microsoft Macintosh DEC Dell 2. Which of the following components was a significant development featured in the Macintosh LISA computer? (A) C Prompt Disk Operating System Graphical User ...

**Biology**

The purines in DNA are A.thymine and cytosine B.thymine and guanine C.adenine and guanine D.adenine and cytosine

**science(check answers)**

Yep! Emily is correct!

**math**

how much greater is 5 miles than 8,ooo

**math**

which is greater 20 feet or 7 yards

**Volumes of pyramids and cones**

Find the missing dimensions. Rectangular pyramid. L=8m, w=4.6m, v=88m3

**sociology**

1. Justice Potter Stewart would most agree with which claim about obscenity? (B) It is easy to concretely determine what obscenity is. People can intuitively understand what obscenity is. Obscenity ought to be allowed so long as no one is harmed. Obscenity involves violence ...

**Science**

how do you draw a bohr diagram of a atom and a ion and how are they different????

**marketing**

should target markets be large and spread out

**Politics**

Question 9 I'm stuck between A or D Question 3 is B I'm having a lot of trouble with question 10

**Politics**

1. The heart of Martin v. Hunter’s Lessee was D A. whether treaties are supreme laws of the land. B. whether states’ rights trumped national authority. C. the right of Virginia to seize property of traitors during war. D. whether the Supreme Court had authority to ...

**Politics**

1. The heart of Martin v. Hunter’s Lessee was A. whether treaties are supreme laws of the land. B. whether states’ rights trumped national authority. C. the right of Virginia to seize property of traitors during war. D. whether the Supreme Court had authority to ...

**physics**

A diver runs horizontally with a speed of 1.30 m/s off a platform that is 8.6 m above the water. What is his speed just before striking the water?

**American National Government**

Control of the bureaucracy through legislative oversight is a matter of (Points : 1) denying Congress’ power of the purse. exercising the legislative veto and scalding agency heads in public sessions. exercising the legislative veto and its spending authority. scalding ...

**American National Government**

Control of the bureaucracy through legislative oversight is a matter of (Points : 1) denying Congress’ power of the purse. exercising the legislative veto and scalding agency heads in public sessions. exercising the legislative veto and its spending authority. scalding ...

**PHYSICS**

homework

**Geography (Ms. Sue)**

URRRRRRRRRRR momm

**English**

18. B 20. D

**English**

13. B 15. B 16. D 18. C 20. A Are those correct?

**English**

Thank you for checking my answers:)

**English**

Thank you so much!! :)

**English**

Okay,thanks!! :)

**applied algebra**

35 ml of a sample are obtained from a crime scene where the ratio of blood to water is 7:3. how much of the sample was blood?