# Posts by Junior

Total # Posts: 102

**maths**

A lorry is travelling at 120 km/hr .At what speed must a car travel to catch up with the speed of the lorry?

**natural science**

we must combine sodium carbonate with which acid to get sodium sulphate?

**math**

the pay per text plan charges $10 per month and $0.10 for each text message. write a function that models this plan, stating what your varible represent

**physics**

Osmium is the densest metal on earth. It has a density of 22.61 g.cm–3. Which of the following best represents this density in kg.m–3?

**physics**

The volume, V, of an object is given as a function of time by equation Where t, is time. Assuming that the equation is dimensionally correct, which of the following is the correct representation of the dimensions for X, Y and Z? Select one: a. X = L Y = L .T – 1 Z = L . T...

**physics**

If Tomasi walks 10 meters due west and then 30 meters due east. What is the total displacement?

**Chemisty**

What volume of 0.57 M HCl is needed to react with 5.6 g CaCO3?

**Life orientation**

Road users must follow driving laws and signs

**math**

a red rosebush has three times as many brooms as a punk rosebush. together they have 48 blooms . which of the following is the number of blooms on the red bush?

**home economics**

Find the marginal and average function for each of the following functions. a). TC=3Q^2+5Q+10, b). TC=30+5Q-2Q^2+4Q^3

**economic**

Find the marginal and average function for each of the following function. TC=3Q^2 5Q 10

**algebra**

how many ounces of a 26% alcohol solution and a 44% alcohol solution must be combined to obtain 56 ounces of a 29% solution?

**Statistics**

A recent study of US children under 11 years old found that they spend on average 142 minutes a day watching tv. Assuming normal distribution with the standard deviation of 44 minutes, answer the following. A) what percent of children of this age spends over 90 minutes per day...

**Science- Astronomy**

Suppose we find a planet in another solar system that has an earth like atmosphere with plentiful oxygen but no life of any kind. Question= Is this discovery considered reasonable or surprising can you please explain? Thank you

**Algebra**

The weights of boxes of candies produced in a factory are normally distributed with a mean weight of 16 oz and a standard deviation of 1 oz. What is the weight of a box of candies with a z-score of 2? 16 oz 18 oz 20 oz 22 oz

**Algebra**

Which set of population data is the least dispersed from its mean? 2, 3, 2, 9 4, 0, 4, 0 6, 2, 2, 2 9, 3, 5, 3

**Algebra**

A supervisor finds the mean number of miles that the employees in a 9the x has a line on top)department live from work. He finds X=2.9 and s=3. Which statement must be true? z376 is within 1 standard deviation of the mean. z37 is between 1 and 2 standard deviations of the mean...

**Algebra**

Two different radioactive isotopes decay to 10% of their respective original amounts. Isotope A does this is 33 days, while isotope B does this in 43 days. What is the approximate difference in the half-lives of the isotopes? 3 days 10 days 13 days 33 days

**Algebra**

Nvm got it c.

**Algebra**

A population of insects increases at a rate of 1.5% per day. About how long will it take the population to double? 2.5 days 5.0 days 46.6 days 66.7 days

**Algebra**

Two different cars each depreciate to 60% of their respective original values. The first car depreciates at an annual rate of 10%. The second car depreciates at an annual rate of 15%. What is the approximate difference in the ages of the two cars? 1.7 ears 2.0 years 3.1 years ...

**Algebra**

The value, V, of Kalani’s stock investments over a time period, x, can be determined using the equation V=75-(0.80)^-x What is the rate of increase or decrease associated with this account?

**Algebra**

Neermind got it

**Algebra**

A business owner opens one store in town A. The equation p(x)=10,000(1.075)^t represents the anticipated profit after t years. The business owner opens a store in town B six months later and predicts the profit from that store to increase at the same rate. Assume that the ...

**Algebra**

Two boys are throwing a baseball back and forth. The ball is 4 ft above the ground when it leaves one child’s hand with an upward velocity of 36 ft/s. If acceleration due to gravity is –16 ft/s2, how high above the ground is the ball 2 s after it is thrown? h(t)=at^2...

**Algebra**

A rectangular swimming pool that is 10 ft wide by 16 ft long is surrounded by a cement sidewalk of uniform width. If the area of the sidewalk is 155 ft2, what is its width? A=lw 2.5ft 5.0ft 6.2ft or 15.5ft

**Math**

he physics department of a college has 9 male professors, 8 female professors, 10 male teaching assistants, and 13 female teaching assistants. If a person is selected at random from the group, find the probability that the selected person is a teaching assistant or a female

**math**

If you are dealt 6 cards from a shuffled deck of 52 cards, find the probability of getting 3 jacks and 3 aces.

**Maths Probability**

3) Interesting, what does "P(X1000=2 ∣ X1000=X1001)" mean ? I did not know you could condition on a future event. Normally I would have approached this using: a) Bayes: P(A|B)=P(A)*P(B|A)/P(B) b) the steady state for the 1->2 transition in 1000 steps.

**algebra**

What do you call an alligator that sneaks up and bites you from behind?

**Probability**

E[AB] and E[NA] are both(2-p)/(p^2).

**Math**

1890

**Statistics**

Multiple choice question that's hard to figure out and understand.(information provided) Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61,74,47,60,62,63,65,79,55,85. The question states: In all, 135 students ...

**statistics**

Multiple choice question that's hard to figure out and understand.(information provided) Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61,74,47,60,62,63,65,79,55,85. The question states: In all, 135 students ...

**math**

80,400

**chemistry**

Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?

**chemistry**

Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?

**5th grade math**

8r1

**Algebra 2**

"your long distance service provider charges you $.06 PER minute plus a monthly access fee of 4.95 for referring a friend,you receive $10 service credit this month.if your long-distance bill is 7.85,how many long-distance minute did you use"

**life orientation**

answer

**history**

i need a hypothesis for the 19th amendment

**Math**

State the range of the function: f(x) = 5ex + 1 A) (0, ∞) B) (1, ∞) C) (-1, ∞) D) (-∞, ∞)

**Math**

A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the ground, to the nearest degree.

**geometry**

one side of an equilateral triangle is 7 dm shorter than one side of square.the sum of the perimeter of the two figure is 49 dm . find the perimeter of each figure.

**math**

Jame shas an assigned seat for his flight to Denver. The seats on the plane are numbered 1-49. Jame's seat number is an odd number greater than 10 that is factor of 100, What is his seat number for the flight?

**chem**

150g will dissolve

**math**

what is the value of 2x+5+3=

**Math**

A bag contains 4 green marbles, 6 red marbles, and 2 white marbles. Three marbles are drawn at random with replacement. With replacement means that after a marble is drawn, it is replaced before the next one is drawn. What is the probability of not green, not red, not white?

**Math**

A bag contains 4 green marbles, 6 red marbles, and 2 white marbles. Three marbles are drawn at random with replacement. With replacement means that after a marble is drawn, it is replaced before the next one is drawn. Find the probability of all three blue.

**Moanalua Middle School**

One box contains six color cards: two blue, three yellow, and one orange. Another box contains four number cards, numbered 1, 2, 3, and 4. One card is picked at random from each box with replacement. find the probability of yellow, then less than 4.

**math**

55

**math**

Im trying to draw a garage that is 34' 1/4''. And on the page its 7'' wide how do i find out what each foot eqauls in inches

**math**

alex family ate 1 7/8 pizzas for dinner .which shows this mixed number written as fractions greater than 1

**math**

alex family ate 1 7/8 pizzas for dinner .which shows this mixed number written as fractions greater than 1

**math**

ms fuller has 2 2/6 pies left over from her party .write the number of pies left over as a fractions greater than 1

**Physics**

Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the charges is 4.0 µC, and the lengths of the sides of the triangle are 4.7 ...

**Physics**

Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the charges is 4.0 µC, and the lengths of the sides of the triangle are 4.7 ...

**SUBTRACTING TWO - AND ONE - DIGIT NUMBERS**

WHAT IS THE ANSWER OF 42- 9= 43-

**geometry**

angle JkL is a right angle. what are m JKM (12x+3) and m MKL (6x-3)

**Business English**

1. We must terminate all deficit financing. 2. We must endeavor to correct this problem by expediting delivery. 3. A proportionate tax consumes a determinate apportionment of one’s monetary inflow. 4. Business has an inordinate influence on governmental operations. 5. It ...

**physics**

cabacdbadbaacabdaac,d ? is not up to 20

**science**

Replications

**Physical Science**

an initially stationary 15.0 kg crate of cheese wheels is pulled via a cable a distance d = 5.70 m up a frictionless ramp to a height of h = 2.5 m, where it stops. What is its potential energy of the crate after it is lifted? how much work is done during the lift? If it takes ...

**Physical Science**

A 4.5 kg ham is thrown into a stationary 15 kg shopping cart. At what speed will the cart travel if the ham had an initial speed of 2.2 m/s ? If the ham hits the cart with 2N of force, how long did the collision between the two last? I know u use the formula v=p/m

**physical science**

A 6 kg bowling ball rolling at 5 m/s strikes a stationary 4 kg bowling ball. If ball #1 is moving forward at 2 m/s after the collision, what is the speed and direction of ball #2? What is the impulse of the system? If the collision last for .5 seconds, how much force is exerted?

**science**

unsramble LMDEAIOTBNCL

**life orientation**

critical discuss human or environmental problem impacts on the community

**math**

definite integral from 0 to pi/2 of cos(theta)

**math**

evaluate 15 x 4 2/3

**math**

Evaluate 15 X 4 2/3

**math**

13 1/3 divide by 6 2/9 = 40/3 x9/56 ANSWER IS 2 1/7

**chemistry**

Acids and bases react with one another to form compounds called ______? A. salts B. ions C. mixtures D. salts, ions, and mixtures

**chemistry**

Which of these best describes energy? A. the emission of particles from unstable nuclei B. the capacity to do work C. the splitting of a nucleus D. the combining of nuclei

**chemistry**

Which of the following has the greatest effect on the properties of an element? A. the number of ions B. the number of protons C. the number of neutrons D. the number of electrons

**chemistry**

What is composed of atoms in fixed proportions? A. mixtures B. compounds C. electrons D. elements

**chemistry**

yea that's y i think its B. hmm i guess ill jus find out if its right

**chemistry**

Which state of matter has the strongest bond? A. liquid B. solid C. gas D. molecule i think B but im not 100% sure

**chemistry**

Which is an example of an anion? A. potassium B. ammonium C. sodium D. chloride

**chemistry**

how many significant figures does 221.5 have

**chemistry**

Which is the Standard International (SI) unit of temperature? Kelvin or Celsius

**chemistry**

What is the positively charged part of an atom called? electron or proton

**english**

I need 5 sentences about the role of education in successful financial planning

**sentences**

write a few sentences adout another famous afro american woman because march famous woman"s month

**english**

how The Federalist Papers would have been more or less successful if newspapers had been printed monthly (rather than daily or weekly).

**Differential Calculus**

nlpc whares bvfy nbu play red

**Personal Finance**

• Both Mr. Jones and Mrs. Green earned $50,000 gross in 2009. Yet, Mr. Jones owed IRS $600 on his tax return while the IRS owed Mrs. Green $600 on her tax return. What do you think were the possible reasons for the difference in the results? Explain.

**Recycling speech**

I need help on a speech about recycling but think of another way to recycle

**Algebra**

Would I do the same thing with this equation? [SQRT(x + 7)] - 2[SQRT(x)] =-2 Beacause I see what you have showed me BUt i am stll a little bit confused. Please if you have the time help me. Thank you.

**Algebra**

Thank you.

**Algebra**

I need help solving this equation. [SQRT(x + 3)] - [SQRT(x - 2)] =1 I know I am supposed to square each side however my teacher tells me I ahve to foil the lefthand side of the equation. Cna someone please help me with this. Thank you.

**Algebra**

Can someone help me solve this type of equation. [SQRT(x + 3)] - [SQRT(x - 2)] =1 . Also. My teacher tells me I keep getting it wrong because after I square both sides, I am supposed to foil the "lefthand side of the equation". IF anyone knows what I am talking about...

**Geography**

'what the est says about habitable

**author**

what does William Phelps mean when he wrote the quote "I divide readers into two classes; those who read to remember and those who read to forget.

**history**

It was in the 1700s, right? It's just that my history book says the Scientific Revolution and Enlightenment lasted from 1550-1800. So does that mean they both lasted from 1550 to 1800? Or just that the Scientific Revolution and Enlightenment were in that time period and ...

**history**

When was the Enlightenment? Thanks!

**science**

thanks

**science**

What do you mean by macho?

**science**

What are ways (other than downsizing cars) in which increased fuel economy can be achieved? and List reasons why people buy SUVs and large trucks. Thanks!

**AP English 3**

In to kill a mocking bird, name two examples of superstitious behavior in chapter 4?