Friday

October 28, 2016
Total # Posts: 101,703

**chem**

If I'm getting an answer around 4.8 can I round that off to 5 for the final state or it remains as 4?

*September 13, 2016*

**math**

There were 36

*September 12, 2016*

**Algebra**

A football game lost 6 yards on their first play in Gained 10 yards on the next play how many yards were gained

*September 12, 2016*

**Social studies**

longhouse

*September 12, 2016*

**Math **

Find the sum of all the even numbers between 75 and 85

*September 12, 2016*

**Algebra **

A light year, the distance light travels in 1 year,is approximately 5.9x10^12 Alpha centauri A,b 4.3 How far in miles is Alpha Centauri A,B. Scientific notation! I thought the answer was 25.37 x10^12

*September 12, 2016*

**Math**

Pencils cost $0.49 each. You estimate the cost as $0.50 each. How many pencils do you need to buy for your estimate to differ from the actual cost by $2.00?

*September 12, 2016*

**Chemistry**

Yes

*September 12, 2016*

**Chemistry**

A chemist wants to make 500.0 mL of 0.215M NaCl. What mass of NaCl is needed? would it be .500 L x .215 M = .1075 mol NaCl .1075 mol x 58.44g NaCl = 6.28g NaCl needed

*September 12, 2016*

**Chemistry**

What volume of 12.1M HCl(aq) is required to make 435 mL of 0.100M HCl? would i just follow the equation V1xM1=V2M2 V1x12.1=.435Lx.100M = 0.00360 L

*September 12, 2016*

**Math**

A square painting measures 2 meters on each side.What Is the area of the painting in square centimeters.

*September 12, 2016*

**Physics**

Each cubic centimeter of silver has a mass of 10.5 g. (a) What is the mass of 62.9 cm3 of silver? (b) When placed on a beam balance, the 62.9-cm3 piece of silver has a mass of only 612 g. What volume of the piece is hollow?

*September 12, 2016*

**Government**

Can also confirm those answers are correct

*September 12, 2016*

**SOCIAL STUDIES (CHECK ANSWERS ASAP)**

A B D

*September 12, 2016*

**mechanic**

Resolve a force of 100 n in to two compound of 200 n each drow sketch .solve this

*September 12, 2016*

**CHECK MY ANSWERS American Government**

my answers have * next to them 1. A political system that separates the law-making and law-enforcing branches is called what? (1 point) a federal system a parliamentary system a presidential system*** a unitary system 2. Which of the following statements best describes a ...

*September 12, 2016*

**Math**

In Marissa's calculus course, attendance counts for 10% of the grade, quizzes count for 20% of the grade, exams count for 55% of the grade, and the final exam counts for 15% of the grade. Marissa had a 100% average ...

*September 12, 2016*

**language arts**

Its A.

*September 12, 2016*

**language arts**

while cyril is smacking the sat cushion,his aunt invites him to look out the window what can you infer from these to details in The Story teller

*September 12, 2016*

**Social Studies**

Adventure is right

*September 12, 2016*

**Social Studies**

1. 3, 4, and 5. 2. 4 3. 2

*September 12, 2016*

**Social Studies**

1. Which are some characteristics of the Middle Colonies? Select all that apply. 1. Some colonists were skilled artisans. 2. They were all established as Royal colonies 3. Most colonists settled for religious reasons. 4. Agriculture was an important industry. 5. Colonies were ...

*September 12, 2016*

**Economic **

J make ice in 4 hours and make cream in 2 hours. P make ice in 6 hours and make cream in 4 hours. What is each opportunity cost of making ice

*September 12, 2016*

**physics**

a force of 20 N acts toward the east. Another force of 27 N acts at the same point toward the west. what is the magnitude and direction of a third force that produces a resultant of 10 N toward the east?

*September 12, 2016*

**Physics **

A car with an initial velocity of 8 m/s experiences a constant acceleration for 3 sec, after which the velocity is 17 m/s. a) What was the acceleration? b) How far did the car travel during that time interval? What would the equations be for each of these questions?

*September 12, 2016*

**maths**

Measure the height of students&estimate mean height

*September 12, 2016*

**Math**

A speeder passes a parked police car at 30 m/s and continues on, obliviously maintaining a constant velocity. At that instant, the police car starts from rest with a uniform acceleration of 2.44 m/s2. a) How much time passes before the officer catches up to the speeder? b) How...

*September 12, 2016*

**Math**

A car with an initial velocity of 8 m/s experiences a constant acceleration for 3 sec, after which the velocity is 17 m/s. a) What was the acceleration? b) How far did the car travel during that time interval? Please help!! ASAP

*September 12, 2016*

**Math**

How we find the 101th term in terms of x (n+1)x + (-1 + 2(n-1))

*September 12, 2016*

**math**

2x-1, 3x+1, 4x+3, 5x+5 ... find the formula

*September 12, 2016*

**english**

Made

*September 11, 2016*

**Chhem**

What determines how long it takes salt water to evaporate

*September 11, 2016*

**Physics **

A car with an initial velocity of 8 m/s experiences a constant acceleration for 3 sec, after which the velocity is 17 m/s. a) What was the acceleration? b) How far did the car travel during that time interval? What would the equations be for each of these questions?

*September 11, 2016*

**Physics **

A speeder passes a parked police car at 30 m/s and continues on, obliviously maintaining a constant velocity. At that instant, the police car starts from rest with a uniform acceleration of 2.44 m/s2. a) How much time passes before the officer catches up to the speeder? b) How...

*September 11, 2016*

**physics**

You are driving your car along a country road at a speed of 21.5 m/s. As you come over the crest of a hill, you notice a farm tractor 35.7 m ahead of you on the road, moving in the same direction as you at a speed of 10.0 m/s. You immediately slam on your brakes and slow down ...

*September 11, 2016*

**Chemistry**

home / study / science / chemistry / questions and answers / a subtilisin with an active site mutation of his ... Question: A subtilisin with an active site mutation of His t... EDIT QUESTION A subtilisin with an active site mutation of His to Ala had a substantially decreased...

*September 11, 2016*

**Chemistry**

Sorry I just realized what you meant. It's 2 times .34 which equals .68

*September 11, 2016*

**Chemistry**

So the answer would be none of the above? I had gotten C?

*September 11, 2016*

**Chemistry**

An enzyme has velocities of 0.11 nmol/min at a substrate concentration of 1 μM, 0.34 nmol/min at a substrate concentration of 5 μM, and 0.45 nmol/min at a substrate concentration of 10 μM. What is the Vmax for the enzyme if the KM is 5 × 10–6 M? A. 0....

*September 11, 2016*

**Algebra**

Idk how to find the min number of sellers

*September 11, 2016*

**Algebra**

Sapphire Island is open 7 days a week. The park has 8 ticket booths, and each booth has a ticket seller from 10 am to 5 pm. On average ticket sellers work 30 hours per week The park plans to hire 20 percent more than the minimum number of ticket sellers in order to account for...

*September 11, 2016*

**algebra**

5 digit palindrone has 5 in ones place and 6 in thousands and mutiple of 9

*September 11, 2016*

**Maths**

Kyle works out that the HCF of the two numbers is: 2squared x 3squared=36 What two numbers might Kyle have been using?

*September 11, 2016*

**statistic**

A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 76&#...

*September 11, 2016*

**History**

The Renaissance was characterized by a. creating military alliances with China b. rising interest in Roman and Greek antiquity c. the idea that religion was the basis of existence d. broadening recognition of the insignificance of the human experience e. an attempt to marry ...

*September 11, 2016*

**maths**

15625 mcube find its sides

*September 11, 2016*

**physics**

the velocity of a body moving with uniform acceleration is 10m/s at a particular instant. its velocity after 5 sec is 20m/s. what was the velocity of the body 3 sec before that instant?

*September 11, 2016*

**Geometry**

Find the area of the largest square that can be cut from a circle whose radius 4 millimeter?

*September 11, 2016*

**Geometry**

Two spheres of copper, of radii is 1centimeter and 2centimeter respectively, are melted into a cylinder of radius 1centimeter. Find the altitude of the cylinder.

*September 11, 2016*

**Math Solving problem**

use elimination method in Algebra Let x be the transported Let y be the dropped then make the equation 5x + 2y = 11 8x + 5y = 5 ---------------- -8 (5x + 2y = 11) +5 (8x + 5y = 5) -------------------- -40x - 16y = -88 +40x + 25y = +25 ____________________ + 9y = -63...

*September 11, 2016*

**Science **

How resistivty of conductor vary if area is halved,length is double,area is double

*September 11, 2016*

**Chemistry**

Calculate the mass and moles of iodine that reacted in the formation of 2.7132 grams of ZnI2. im slighty confused about the use of iodine, would it be diatomic in the equation for example would i use the conversion 1 mol ZnI2 = 1 mol I2 or 1 mol ZnI2 = 2 mol I

*September 11, 2016*

**Math trigo**

Tan 660'

*September 10, 2016*

**Physical Chemistry**

5. Assume you have a 45°C 100g block of gold (cp=0.129J/g°C) and a 150°C , 150g block of silver (cp=0.240J/g°C)(1). You place these blocks into an adiabatic container in thermal contact. a. Calculate the final temperature b. Calculate the heat transferred c. ...

*September 10, 2016*

**American Government**

I know the three types make up the thirteen colonies, and I know they did explore the unicameral and bicameral houses. I do know about them, considering I answered the third question, I am just having trouble with the options

*September 10, 2016*

**American Government**

Okay, can you please explain question four, I'm also having trouble understanding that one. The help you're giving me is much appreciated

*September 10, 2016*

**American Government**

Oops I meant question 2 sorry!

*September 10, 2016*

**American Government**

Then... 4.B I am just slightly confused with two as my textbook states: "Everywhere, the people were recognized as the only source of governmental authority. In the new United States, government could only be conducted only with the consent on the governed." I ...

*September 10, 2016*

**Lifespan Development**

In adolescence and early adulthood, male and females begin to spend more time in mixed-gender groups. Studies of who has more influence on the outcome of problem solving in mixed-gender groups indicate that: A. Females have an advantage because have learned to negotiate in ...

*September 10, 2016*

**Lifespan Development**

Tiffany is 3 years old. She knows that she is a girl, and she expects to be a girl tomorrow, but she does not understand that her gender is permanent. She believes that cutting her hair short could change her gender. Tiffany has ___________ but not __________? A. GENDER ...

*September 10, 2016*

**Biology**

Jacobie wanted to test the projectile motion of a pumpkin. His hypothesis was "if the pumpkin had a larger mass, then the higher he could throw it, because the larder pumpkins would have more force." He bought three orange pumpkins and test them all on the same day. ...

*September 10, 2016*

**Physical science**

The instantaneous speed of a particle moving along one straight line is v(t) = ate^−4t, where the speed v is measured in meters per second, the time t is measured in seconds, and the magnitude of the constant a is measured in meters per second squared. What is its ...

*September 10, 2016*

**Algebra**

-2x+6 what is the rate of change between the two variables, what is the y intercept, can you Also answer these same questions for the equation y = -3x + 10

*September 10, 2016*

**Chem**

How many significant figures are in these numbers 1,000 has 1 2.134 has 4 0.00001 has 1 10,005 has 5 1.000 has 4

*September 10, 2016*

**Math**

272 multiply 42 +272multiply 50+272multipy 8 and name the property applied on it

*September 10, 2016*

**general adult education**

some have more than a hundred some have none

*September 10, 2016*

**Algebra**

An emergency team needs to be on the roof of the hospital 3 minutes before the helicopter arrives. It takes the team 4 minutes to reach the roof. At what time should the team start moving to the roof to meet the helicopter? Explain your reasoning

*September 10, 2016*

**College Algebra **

A 6 ft tall man is standing 40 feet from the light post, if his shadow is 20 feet, determine the height of the lamp. Here I use simple ratios: 40ft + 20ft = 60ft 6/20 = h/60 Cross multiply both sides with 60: 6 (60)/20 = h 360/20 = h h = 18 Height of the lamp is 18ft. P.S. Is ...

*September 9, 2016*

**Physics **

Superman lived on Krypton where the acceleration due to gravity is 23.6 m/s2. If a woman falls from a building that is 88.3 m tall, how long does he have to save her before she hits the ground? Givens: Unknown: Substitute: Solve:

*September 9, 2016*

**Social studies**

Can someone check my answers

*September 9, 2016*

**Calculus**

An airplane takes off from an airport at sea level and climbs at the constant rate of 5m/s . The outside air temperature T varies with altitude h according to the law T=15-0.0065h where T is measured in degree Celsius and h in meters above sea level . Find the rate of change ...

*September 9, 2016*

**math**

you have 8 different flavors of ice cram and 10 diff toppings how many different desserts could you make

*September 9, 2016*

**maths**

2,3,5,7,11,13,?"

*September 9, 2016*

**Math**

Find the area of the largest square that can be cut from a circle whose radius 4 mm?

*September 9, 2016*

**Math**

Two spheres of copper, of radii is 1 cm. and 2 cm. respectively, are melted in to a cylinder of radius 1 cm. Find the altitude of the cylinder.

*September 9, 2016*

**anal.gom.**

ellipse has an equation of x^2+3y^2+16x+4=100y? standard form

*September 9, 2016*

**Chemistry**

33,999

*September 9, 2016*

**Physics**

The three displacement vectors have a magnitudes of a= 5.00 meters, b= 5.00 meters, and c= 4.00 meters. Find the resultant magnitude and Direction angle of the three vectors by names of the component method. Express the directional angle as an angle above the positive or ...

*September 8, 2016*

**Economic **

Q^s=2p

*September 8, 2016*

**Math**

Timmy has 12 watermelons and Tina has 14, each watermelon with 12.73 inches and 2.7 inches in hight. Then what is the total length of Tina's watermelon's how over Timmy's *Solve for x= the untold length of watermelon*

*September 8, 2016*

**Physics**

In college softball, the distance from the pitcher's mound to the batter is 43 feet. Part A If the ball leaves the bat at 105 mph , how much time elapses between the hit and the ball reaching the pitcher? Express your answer to two significant figures and include the ...

*September 8, 2016*

**physics**

In college softball, the distance from the pitcher's mound to the batter is 43 feet. Part A If the ball leaves the bat at 105 mph , how much time elapses between the hit and the ball reaching the pitcher? Express your answer to two significant figures and include the ...

*September 8, 2016*

**Math**

Hi John. wants to receive a 96% average on 4 math tests .So far he has taken 3 tests.His grades are 94%, 98%, and 98%. Write an equation in terms of to find

*September 8, 2016*

**Maths**

The probability of a biased coin landing on heads is 0.6. I flip the coin 150 times, how many times would the coin land on heads?

*September 8, 2016*

**Math**

What are the missing numbers between 10 22 34 46 58 on the number line

*September 8, 2016*

**Math**

Two spheres of copper, of radii is 1cm and 2cm respectively, are melted into a cylinder of radius 1cm. Find the altitude of the cylinder.

*September 8, 2016*

**Math**

Find the area of the largest square that can be cut from a circle whose radius 4 mm

*September 8, 2016*

**Math**

John. wants to receive a 96% average on 4 math tests .So far he has taken 3 tests.His grades are 94%, 98%, and 98%. Write an equation in terms of to find

*September 8, 2016*

**math**

from a particular point the angle of elevation of the top of a church spire is 35 degrees. walking 30 metres closer to the church the angle of elevation of the top of the spire increases by 20 degrees. a. how far from the church was the second elevation taken? b. calculate the...

*September 8, 2016*

**chemistry**

The oxidation of NO by O3 is first order in each of the reactants, and its rate constant is 1.5 ´ 107 M-1·s-1. If the concentrations of NO and O3 are each 5.0 ´ 10-7 M, what is the rate of oxidation of NO in M·s-1?

*September 8, 2016*

**geography**

Memories

*September 8, 2016*

**physics**

A balloon was released at sea level from the bottom of a building and retrieved at the top of the building. Its volume changed from 500 cm^3 to 510 cm^3. The pressure at sea level is 100 kPa. If the density of air is constant at 1.29 kg/m^3, what is the height of the building?

*September 8, 2016*

**Math**

You need to use -,+,*,and division to meet the restrictions.

*September 8, 2016*

**Calculus**

How do I get the numerical approximations?

*September 8, 2016*

**Calculus**

How do I solve this problem without integrals or derivatives? Find the distance traveled in 14 seconds by an object that is moving with a velocity of v(t) = 11 + 6cos t feet per second. A. 154.8204 B. 156.1704 C. 159.9436

*September 8, 2016*

**Chemistry**

But is it an understate in Sodium Bicarbonate not CO2?

*September 7, 2016*

**Chemistry**

Using a closed system experiment will a leak during gas evolving reaction overstate or understate the amount of sodium bicarbonate in an alka seltzer cold tablet?

*September 7, 2016*

**Chemistry**

Element X has 6 protons, 8 neutrons, and 6 electrons. Predict the atomic mass of element X?

*September 7, 2016*