# Posts by kay

Total # Posts: 785

**algebra**

1. simplify the rational expression by rationalizing the denominator? 4 over sqrt 150 __________________ sqrt 189x

**Algebra B**

1. simplify the rational expression by rationalizing the denominator? 4 over sqrt 150 __________________ sqrt 189x

**Chemistry **

The half life of a radioactive material is 120 months. How much of this material will be left after 350 months if the initial concentration is 2.40M?

**Science**

The periodic table is arranged according to several trends. Which of the following is true as you move from left to right along the periodic table: A the element's atomic mass decreases and the atomic number increases B the element's productivity increases C the ...

**P.E**

Anger is a normal emotion that all humans feel at some time. It is important to express this emotion in a healthy way. Which of these ways of dealing with anger might affect your health in a negative way? A.) Accept your feelings B.) Ignore your triggers C.) Talk about the ...

**Math**

A circle is divided into 20 equal parts. Find the angle measure of one of the parts .

**Math**

6 friends share 5 apples equally. How much apple does each friend have?

**Social studies**

Is it b

**Physics**

Question: A 62 kg astronaut floats outside a 3200 kg spacecraft. She's initially stationary with respect to the spacecraft. Then she pushes against the spacecraft and moves away at .50m/s to the left. I got an answer of .0096kg from doing 62*.50/3200 but that is incorrect...

**Science**

Identify six stages of the process of scientific inquiry (scientific method) and explain why the process is not a rigid sequence of steps.

**Math**

Meghan and Sabrina compared the amount of interest they each earned on their savings accounts. Each had deposited $1000, but Meghan earned $140 interest and Sabrina earned $157.50. Whose savings account had a higher interest rate? Explain.

**Math**

Nick borrowed $7150, to be repaired at an annual simple interest rate of 6.25%. How much interest will be due after 5 years? How much will Nick have to repay?

**Physics**

A helicopter rises vertically with a constant upward acceleration of 0.40 m/s2 . As it passes an altitude of 20 m, a wrench slips out the door. A) How soon does the wrench hit the ground? B) At what speed does the wrench hit the ground?

**Physics**

After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 2.5 m/s from 1.5 m above the ground. A) How much time does it take until the book hits the floor? B) What's its velocity then?

**Physics**

You're approaching an intersection at 50 km/h (13.9 m/s ). You see the light turn yellow when you're 35 m from the intersection. Assume a reaction time of 0.6 s before braking begins and a braking acceleration of -3.0 m/s2. A) will you be able to stop at before the ...

**Physics**

A stock car starts from rest at time t=0 with velocity (m/s) increasing for 4.0 s , according to the function Vx=1.4t2+1.1t. a) Find the car's velocity at the end of the 4.0 s interval. b) Find the average acceleration for this interval.

**Physics**

A car travels a straight road at 140 km/h for 30 min then at 90 km/h for 10 min. It then reverses and goes at 90 km/h for 20 min. a) Find the average velocity for the entire trip. b) Find the average speed for the entire trip.

**Physics**

The winner of the Kentucky Derby runs the 1.25-mile race in 2 minutes, 2.0 s. What's the horse's average speed in m/s? A Message from Your Instructor: Velocity refers to the displacement from the initial point to the final point. For the first part, determine where the...

**Algebra **

a submarine was cruising at a depth of 1,375 feet. The captain gave an order to climb 450 feet. Compared to sea level , find the depth of the sub

**SAT Math**

The function w is defined by w(x)=6+3x. If 4? w(z)=96, what is the value of z? So is w(x)=w(z)?

**SAT Math Question?**

Lindsey and Stephen work at a factory. Lindsey can complete one full job in three hours, and Stephen can complete the same job in five hours. If Lindsey and Stephen work together on the job for one hour, then how long, in minutes, will it take Stephen to finish the job himself?

**SAT Math**

The correct answer is 3/5, but I don't know how. Thank you!

**SAT Math**

All of the students who took chemistry at Groveton High School last year were juniors or seniors, as shown in the table below. If 80% of the students who took chemistry passed, then what fraction of the students in the combined junior and senior classes took chemistry? Class ...

**SAT Math**

If m percent of 50 is equal to 20 percent of n, then what is the value of m/n? Thank you!

**SAT Math Question?**

Which of the following accurately defines all possible values of p-q if 15?p?30 and 7?q?19? The answer is -4?(p-q)?23, but I'm not sure how. Thank you!

**American Government**

Yes! thank you

**Math**

There are 12 more girls than boys in the class. 35 % of the class are boys. How many pupils are there in the class?

**physics**

an aeroplane has a mass of 15 tonnes. At cruising speed,air flows over the top of it's wing at 150 m/s and under the wing at 120m/s. Calculate the pressure in difference between the top and the bottom of the wing and the surface area underside the wing

**Physics**

An object is sliding along a flat surface with an initial speed of 30 m/s. What must the coefficient of kinetic friction be between the object and the surface if the object slides to a stop in 10m? What would be the speed of the object after it had only slide half that distance?

**English**

supposed**

**English**

There is no need for you to be rude Les. She meant how are we suppsoed to help if you dont give out a list of the stories we had read. Im also in this class.

**Chemistry**

One-third cup of vanilla ice cream provides about 145 kcal of energy. A typical adult uses about 195 kcal/hr of energy while walking. If all of the energy in one third of a cup vanilla ice cream were to be burned off by walking, how many minutes would it take for this energy ...

**English**

is it A or not?!?

**Algebra**

The formula I = PRT where I = Interest, P = principal, R = rate, and T = time is used to calculate the amount of simple interest earned. Solve this formula for T.

**History**

In what way was the government of ancient Athens different from that of the United States? A. Athens was direct democracy in which citizens voted on laws themselves B. Athens was an oligarchy ruled by the wealthy members of the council of 5 hundred. C. Athens was a republic in...

**Math**

You are buying 4 tickets for a football game on stub hub for tickets are $60 each you have to pay a handling fee of $5 per ticket and a shipping fee of 10 for the entire order How much is or going to cost? How much does each person owe you for their fair share?

**Math**

Jay can jump rope at a rate of 8 jumps for every 10 seconds . Find the rate

**spanish 2**

DOES ANYONE KNOW THESE?!??

**Maths**

0.5 of peters money is 3.50 how much money has he altogether

**math**

If one person can do a job in 60 minutes and another per can do it in 90 minutes, how long will it take them, working together, to do the job?

**Physics**

You are testing a car on the Nevada salt flats traveling 85 m/s. Your parachute deploys and you decelerate at 13 m/s^2. How long does it take to come to a complete stop?

**Math 6th grade**

Tony owns a personal training business. He makes a total of $500 for every 3 clients he acquires. If Tony is saving to purchase 2,2000 in new equipment , how many clients will he need?

**Science**

Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks. By reading the records that...

**Math**

Which equation represents the situation? The sum of three consecutive integers is 36. x+(x+3)+(x+3)=36 x+(x+1)+(x+2)=36 x+(x+2)+(x+4)=36 x+x+x=36

**ss**

i mean d

**ss**

A. By gaining control of Quebec, the British could increase financial and military support from the colonists.*** B.By gaining control of Quebec, the British would disrupt French supplies from reaching forts further north. C. Without capturing Quebec, the British would have ...

**astronomy (check my answer)**

I think it's a, that Regulus is further away than Denebola.

**astronomy**

At your telescope, you measure the parallax of the star Regulus to be one-half of the parallax of the star Denebola. What do you immediately know about their relative distance from us? a) That Regulus is further away than Denebola. b) That Regulus is closer than Denebola. c) ...

**math**

A popular snack food reduced the amount of sodium in one serving from 700 milligrams to 630 milligrams. What is the percent decrease in the amount of sodium in this snack?

**Social Studies Help ASAP**

1. b 2. correct 3. b & c 4. b

**Algerbra**

BK--go to the site called openstudy they will actually tell you the answers and help you.

**Social Studies (check my answers))**

1. b 2. d

**math**

33 pounds of bananas cost $163.50. how much would 18 pounds cost? how much would a one pound banana cost?

**GEOMETRY**

A gumball machine contains 150 gumballs. If the probability of getting a yellow gumball is 1/7, what is the probability of not getting a yellow gumball?

**GEOMETRY**

if one coin is flipped and then a second coin is flipped, what is the probability that both coins land on tails? A) 1/8 B) 1/32 C) 1/16 D) 1/4

**GEOMETRY**

A soda company determines that there is a 3% chance that a soft drink bottle is under filled. If two bottles are selected at random, find the probability that both bottles are under filled

**GEOMETRY**

if a die is tossed and a coin is flipped, what is the probability of getting a number less than five on the die or tails on the coin? (write answer as a fraction in lowest terms)

**GEOMETRY**

A letter is chosen at random from the word mathematics. what is the probability of choosing either a T or an M? A) 4/11 B) 3/11 C) 1/11 D) 2/11

**GEOMETRY**

a bag contains seven red balls numbered 2,4,5,6,7,8,10 and three white balls numbered 1,3, and 9. If a ball is drawn, what is the probability the ball is white or the number on the ball is less than 3? Write your answer as a fraction in lowest terms.

**GEOMETRY**

from a bag containing 6 white balls, 3 black balls and 13 red balls, two balls are drawn at random. what is the probability that they are both red?

**Math**

Every 1 1/2 on a wilderness map represents 1 mile. If the actual distance between two likes is 10 miles how far apart are the lakes on the map?

**physics**

A reflecting telescope is used to observe two distant point sources that are 3.50 m apart with light of wavelength 600 nm. The telescope's mirror has a radius of 5.0 cm . What is the maximum distance in meters at which the two sources may be distinguished?

**CHEM 2: Boiling Point**

Which Aqueous solution has the highest normal boiling point? a.) 0.1 m NaCl b.) 0.1 m C2H5OH c.) 0.1 m CaCl2 d.) They all have the same boiling point. I think that the answer is D, the all have the same boiling point. Is this correct? Because Delta T= K(b)msolute .... and if ...

**CHEM 2 Question**

For A+2B <---> 2C : K=2.23 For 2C <---> D : K=0.27 What is the value of the equilibrium constant for the reaction: 2D <---> 2A + 4B ? I calculated it and got this: k=(k1)(k2) =(2.23)(.27)=0.6021 =(1/0.6021)=1.67 =(1.67)^2= 2.76 Is this answer correct? I am ...

**Science Chemistry**

So the answer is: 43.78 / 46.068 = 0.929 M?

**Science Chemistry**

A sample of beer is 4.6% by Mass C2H5OH. The density of beer is 0.93 g/mL. What is the molar concentration of C2H5OH in this sample of beer?

**Algebra**

3fg(,f^2+5f-4)=

**science**

the answer is D. I just took the test and got it right

**Math**

Don't trust the person "helping you" at all . They are a lier!!!

**math**

Math star . What are the answers?

**Chemistry**

What is osmolarity of a 0.20M MgSO4 solution, which is 50% dissociated?

**Lab Math**

What is osmolarity of a 0.20M MgSO4 solution, which is 50% dissociated?

**Math**

A Gentoo penguin can swim at a rate of 17 mph. How many miles can a penguin swim in four hours? Use the expression RT, where R represents rate and T represents time.

**accounting**

5.90

**Math**

Create a piecewise function of the following scenario where D(t) is the total distance walked in miles as a function of time T (in minutes) You begin a walk from your home at a fast pace of 6 miles per hour for 30 minutes. You rest for 15 minutes, and then you continue walking...

**Math**

What is the area of a pentagon with sides of equal length, measuring 5v+3?

**Social Studies**

How do jobs today differ from the Jeffersonian era (agriculture, crafts, shipping)? Does it make a difference in the way education is conducted, public or otherwise?

**math**

Are is their a good website that has good video with precal lessons im havong difficulty with a bad teacher

**Psychology**

A man feels anxious and a little sick to his stomach when he walked up to the front door of his old elementary school. School had been very hard for him and he remembers feeling “stupid” a lot of the time he was in school. What is the unconditioned stimulus and ...

**math**

Are is their a good website that has good video with precal lessons im havong difficulty with a bad teacher

**Physics**

with what minimum speed must a ball be thrown straight up in order to reach a height of 34 meters above the launch position?

**Science**

My granddaughter has to do a project about a product she would create and test we've decided on the safetyof white paper napkins vs dyed ones I don't know where to begin please help

**Physics**

The coordinate of a boy running across a parking lot as a function of time is gives as :x0†3=3t*2 7.2t 28 and y0†3=0.28t*2 - 9.1t 30...express the boys position vector r0†3 and velocity v0†3 in unit vector rotation and find the ...

**Phychology**

Which of these guests would require service to their car? A young mother with her baby A man in his workout wear A couple with three bags of groceries An elderly person with one bag of groceries All of the above

**Pre- Algebra**

State if each number is Rational,Irrational,or not a real number? 1.)square root of 9/16 2.) square root of -9 3.)square root of -16 divided by -4 4.)square root of -8(-2) 5.)square root of 25 divided by 8 6.)square root of -1/4 Please Help! I have been sick for 4 weeks and I ...

**geometry**

Perimeter of pool is 84ft squared. The removal charge for tile is $20 per linear foot. Each new 6-inch square tile costs $2. A pool professional installs the new tile for an additional $300 charge. What is the total cost for removal and installation, and additional charge?

**geometry**

Perimeter of pool is 84ft squared. The removal charge is $20 per linear foot. Each new 6-inch square tile costs $2. A pool professional installs the new tile for an additional $300 charge. What is the total cost?

**geometry**

- One cubic foot is approximately 7.5 gallons of water - A typical garden hose releases approximately 11 gallons of water per minute Total cubic feet is 2268. How long will it take to refill the pool?

**Algebra**

A square has an area of 49 square units. Find the sode length and perimeter of the square.

**Social studies**

How did the proclamation of 1763 attempt to protect native American rights and land? I need help asap beacause it due tomorrow

**Precalculus**

10x^2=2^x Hi! How do I go about solving an equation like this? It's meant to be a calculator solution but I'd love to know how it's done by hand. Logarithms maybe? .. Thank you in advance (:

**us history**

Did you get it right? I thought it was A

**Family Dynamics**

culture

**Geometry**

The answer is 12

**Geometry**

Nvm I got it

**Geometry**

Why does it say plus 2?

**Geometry**

The degree measure of the vertex angle is (3x-8). The degree measure for each base angle is (6x-41). What is the value of vertex angle?

**Algebra**

Solve. 1.) 7/33y = -56/3 2.) 8/11k = 29/44

**Biology**

Ya diche bag

**Physics**

A rocket has put your spacecraft in a circular orbit around Earth at an altitude of 350 km. Calculate the force due to gravitational between the Earth and the spacecraft in N if the mass of the spacecraft is 2450 kg.