# Mary

Newest questions posted by Mary-
## Math

Martha recorded the ratio of students and teachers at all the middle schools in the Timber Creek school district. The list is shown below. 20 students : 2 teachers 1 teacher per 15 students 1 teacher per 10 students 40 students : 4 teachers 5 teachers per -
## Math

Let A be a subset of U. {null,{null}} - {null} =? -
## Math

What is the intersection of a null set and a set containing a null set? -
## Statistics

5. Emily was conducting a survey about her friends' favorite movies. She asked her friends the following questions. Do you prefer action movies of boring drama movies? Which of the following words is most likely to cause bias to her results? A Prefer B -
## Statistics

2. Which question is an example of a statistical question? A . Ask all your friends, " What is your favorite color"?^^^ B. Ask your teacher, What college did you attend? C. Ask one of your neighbors, How many times did you eat pizza this month? D. Ask -
## Statistics

1. Statistical questions will have...? A Only one correct answer B. A Variety of answers C. Fewer of three answers D. No answers -
## geography

Which of the following made the first villages possible? A. warm clothing B. government C. armies D. ^^^^^^^^^^^^^^^^^^^^^ farming -
## SS

Why did people domesticate plants? A. They were more flavorful. B. They were a reliable food supply. C. They made it easier to migrate. D. ^^^^^^^^^^^^^^^6 They wanted to live in a variety of environments.? -
## Math

th 6th grade I have to covert 64 into fraction,decimal and percentage. So my answer is: Fraction 64/64 Decimal 1.01 Percentage 101% Plz correct if it’s wrong. Thank you! -
## Math 6th grade

I have to covert 64 into fraction,decimal and percentage. So my answer is: Fraction 64/64 Decimal 1.01 Percentage 101% Plz correct if it’s wrong. Thank you! -
## Physics

23. (1 pt) the signal reached an instantaneous phase of 90 ̊? If 100 Hz pure tone with a starting phase of 0 ̊ is listened to for 1.5 s, then how many times has a) 50 b) 100 c) 150 d) 200 e) 250 -
## Geometry 10

Triangle ABC is extended to point D Angle CAB =x+40 Angle ACB = 3x +10 angle CBD = 6x what is measure of angle CAB? I can get angles inside triangle to equal 180 but when I check for the extended point it does not add up to straight line 180 -
## Geometry 10

Triangle ABC is extended to point D Angle CAB =x+40 Angle ACB = 3x +10 angle CBD = 6x what is measure of angle CAB? I can get angles inside triangle to equal 180 but when I check for the extended point it does not add up to straight line 180 -
## physics

a mass of 0.5 kg is attached to a spring. the mass is then displace from its equilibrium position by 5cm and released. its speed as it passes the equilibrium position is 50cm/s. -
## Chemistry

How many grams of H2 are needed to produce 11.61 grams of NH3? -
## Chemistry

How many grams of H2 are needed to produce 11.61 grams of NH3? -
## Science 7th grade

I am doing a project Energy Transformation Illustration. I picked a gas stove for this project. I have to draw three thing to show its transformation. What I have to draw for first and second transition? Third is gas stove. Plz help. -
## Parentheses English

Proofreading... The patient was being seen for an injured left ankle he suffered during a motorcycle accident (On a dirt race track, I believe.) This patient has a longstanding history of depression and has expressed thoughts of suicidal ideation [which -
## math

leah said jordan walked 3 and 5 tenths kilometers on wednesday what error did she make -
## Math

I am working with absolute value. I understand this concept for |x| When x= Greater or equal to 0 |-x| when x= less than 0 Now I don’t understand this below. -|x| Please help. Thank you! -
## 6th grade math

I am working with absolute value. I understand this concept for |x| When x= Greater or equal to 0 |-x| when x= less than 0 Now I don’t understand this below. -|x| Please help. Thank you! -
## 6th grade math

Can you find a set of 3 different numbers that make this equation true? ?^3+?^3=?^3 I tried but couldn’t think of any possibility. Please help. -
## 6th grade math

it takes harrison 1 1//2 hours to finish his history project. it takes miles 3 2/3 hours to finish his science project. how many times as long does it takes miles to finish his science project than it takes harrison to finish his history project? Do I have -
## 6th grade math

bob paid $1210 for 5 tables and 7 chairs for his company. each table costs three time as much as each chair. of ann bought 8 such table and 4 such chairs. how much money would she has to pay? Plz help with this question. Thank you! -
## Algebra

The prices of the systems are: $1200 for System 1, $1500 for System 2, $1600 for System 3, and $1800 for System 4. Write the information from the table as a 4 x 3 matrix B. Write a row matrix A for which the entries represent the prices for the systems. If -
## math

An airline with two types of airplanes, P1 and P2, has contracted with a tour group to provide transportation for a minimum of 400 first class, 900 tourist class, and 1500 economy class passengers. For a certain trip, airplane P1 costs $10,000 to operate -
## Algebra

How much will you have accumulated, if you annually invest $1,500 into an IRA at 8% interest compounded monthly for: a. 5 year b. 20 years c. 40 years d. How long will it take to earn your first million dollars? Your answer should be exact rounded within 2 -
## Algebra

How much will you have accumulated over a period of 30 years if, in an IRA which has a 10% interest rate compounded quarterly, you annually invest: a. $1 b. $4000 c. $10,000 d. Part (a) is called the effective yield of an account. How could Part (a) be -
## 6th grade math

Rodrigo placed 3 large stickers on each of 5 pages in the sticker book. then, he placed 6 small stickers on each of 5 pages. the expression 5x3x6 shows the total number of stickers he used. use the distributive property write this expression another way. -
## Algebra

Convert to an exponential equation. log 11 = 1.0414 A 101.0414 = 11 B 111.0414 = 10 C 1.041410 = 11 D 1011 = 1.0414 -
## Algebra

Given that loga7 = 0.845, and loga2 = 0.301, find loga343 A 0.603 B 2.535 C 1.146 D 0.254 -
## Algebra

Express as a sum of logarithms. ln 4x A ln 4x + ln x B ln 4 - ln x C ln 4 + ln x D ln(4 + x) -
## Algebra

A sample of 600 grams of radioactive substance decays according to the function A(t)=600e^-0.045t where t is the time in years. How much of the substance will be left in the sample after 20 years? Round to the nearest whole gram. A 778 g B 1 g C 0 g D 244 -
## Algebra

An initial investment of $480 is appreciated for 8 years in an account that earns 9% interest, compounded quarterly. Find the amount of money in the account at the end of the period. A $978.29 B $956.43 C $498.29 D $956.76 -
## 6th grade math

How many different 3-digit numbers can you make with the following digits if no digit may be repeated in the same number? 2 7 8 0 3 1 Is there any way I can solve this problem by writing equation? -
## Math

Mary has a loan for $250. If she pays $15 per month with 12% APR and interest compounded monthly, how long will it take to pay off the loan -
## Math 6th grade

jack has flags for 4 different football teams. he wants to hang the flags in a straight line on his bedroom wall. in how many different ways could jack hang the 4 flags? I came up with 16. 4*4=16 But 16 is not in the answer choice. Answer choices are- -
## math

Find the standard form of the equation of the ellipse with the given characteristics and center at the origin. (2,0), (0,3/2), (-2,0), (0,-3/2) -
## math

Find the standard form of the equation of the circle with the given characteristics. Center: (5, -2); point on circle: (-3, -4) -
## physics

Pls what is the specific of water? Is think is 4200 but my mates are saying it's 4180 -
## physics

Pls is specific capacity of tin 226 j.kg/k -
## algebra

2 times the sq rt of 5 + 3 times the sq rt of 7 ^2 -
## s.s.

How did Augustus change the Roman Republic? How did Augustus pave the way for 200 years of peace and prosperty? Plz plz help me -
## math please help and hurry!!

What is the rate of change for 2x^2 + 3 and 2^x + 3?? I have no idea please help meeeeeeeee -
## Physics

A ball rolls down a ramp that's set on a table, and from there falls off the table. The height of the ramp, length of the ramp, and height from the table are known, and the task is to find the horizontal displacement. One can use mgh = 1/2mv^2 + 1/2kmv^2 -
## Physics

A ball rolls down a ramp that's set on a table, and from there falls off the table. The height of the ramp, length of the ramp, and height from the table are known, and the task is to find the horizontal displacement. One can use mgh = 1/2mv^2 + 1/2kmv^2 -
## chemistry

Calculate the [H⁺] for the aqueous solution in which [OH⁻] is 1 x 10⁻⁹. Is this solution acidic, basic or neutral? Show your work -
## English

Please show me an agumentative essay on boys helping girls in the kitchen -
## SOCIAL STUDIES HELP PLEASE!!!

how did the supreme court decision in Worcester V.Georgia and the Indian removal act lead to the removal and resettlement of native Americans groups? Can anyone help me with this please? -
## Chemistry

The relative atomic mass of natural lithium is 6.95 it consist of two isotopes of relative masses 6.02 7.02 calculate the natural abundance of the isotopes -
## Math

Left hand! right hand Female___!________ Male_____!_______ Total-18 ! 122 The incomplete table above summarizes the number of left-handed students and right-handed students by gender for the eighth grade students at Keisel Middle School. There are 5 times -
## Reed

how do you know? this is what you said... Trying to give and get answers here is frowned upon. The object is to help students learn, not just give away answers so that nobody has to study and learn anything. Giving away answers can get a person banned from -
## science

C=5/9(F-32) The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Celsius. Based on the equation, which of the following must be true? A temperature increase of 1 degree Fahrenheit is -
## Math/Science

Reaction Time (ms) Cue Colour Green Red Bicolour (red only) 1 680 650 460 2 480 470 310 3 350 300 270 4 300 470 300 5 320 290 610 6 260 290 300 7 290 220 340 8 260 280 230 9 320 250 260 10 440 330 11 270 230 12 270 220 13 250 280 14 250 260 15 250 300 16 -
## physics

A ball of mass 0.05 moving at 10m per seconds collides with another ball of equal mass at rest if two balls move off together after the impact calculate the common velocity -
## Algebra 1

USE REGRESSION, FIND BEST FIT EQUATION FOR DATA (1,56), (2, 29), (3, 13), (4, 7), (5, 2) -
## Algebra 1

Cassandra bought a car for 22,385. The value depreciates 14% a year. a. Write a function, d(x), that gives the value of the car after x years. b. What will the value of Cassandra's car be after 10 years -
## Algebra 1

Evaluate a(1)-b(1) -
## Algebra 1

Give a value for x such the A(X)>b(X) -
## Algebra

Factoring Polynomials GCF and Quadratic Expressions: 5b^2k^2+25bk^2-250k^2 The answer I figured was GCF for the polynomial is 5 and the GCF for the variable is bk^2. Is this correct. -
## physics

In a simple model of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 3.4 ✕ 106 m/s. Determine the radius of the electron's orbit. ___m -
## How to solve algebra word problems

Pecans sells for $3.50 a pound. Almonds sells for $5 pound. How many pounds of each should be used to make 15 pounds of mixture that sells for $4 a pound? -
## Math

An older person is seven years older than six times the age of a younger person. The sum of their ages is 21. Find ages -
## Physics

A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to -
## science

The main cause of the changing location of the tides on earth is -rotation of the Earth on its' own axis - magnetic forces of the Moon - the revolution of the Moon around the Earth *** -the position of the Sun -
## science

the best explanation of why the Moon appears to change shape throughout the month is •from Earth's perspective, we see varying amounts of the illuminated part of the Moon. • the Moon is revolving around the Earth** • from a bird's eye view, the Moon -
## science

the variation in seasonal temperatures and amount of daylight • decreases as latitude increases • changes most at the equator • stays the same at the North and South Poles • increases as latitude increases -
## Algebra

On a scale drawing if 1/4 of an inch represents a distance of 1 foot then a line on the drawing measuring 8 1/2 inches represents ? Feet -
## I.ter.ational bussiness

according to cnn (2016/06/24), the British pound (GBP) crashed to its lowest level as low as$1.32/GBP. The exchange rate on June 23rd 2016 was $1.4883/GBP a)by what % has the Gbp appreciated or depreciated against the dollar during this period? b)bu what % -
## I.ter.ational bussiness

according to cnn (2016/06/24), the British pound (GBP) crashed to its lowest level as low as$1.32/GBP. The exchange rate on June 23rd 2016 was $1.4883/GBP a)by what % has the Gbp appreciated or depreciated against the dollar during this period? b)bu what % -
## SAT

How much SAT score will be needed to get a scholarship to a good engineering university in the USA? I'm new to these things and hope someone will help,other than Google searching. Thank you! -
## Universities

What are the best universities in the USA which offers Transport and Logistics Management degree and what are the main requirements for an international student obtain a scholarship from that university for the mentioned degree? What are the chances for an -
## maths

The rectangular backboard of a basketball court needs to be assembled. Its area is given as 18,900 cm2 and the width as 1.8 m. What is the backboard’s length in metres -
## math

the sum of the three numbers in GP IS 35 and their product is 1000. find the numbers -
## Physics

A charge of 5.00 ✕ 10^-9 C and a charge of -3.50 ✕ 10^-9 C are separated by a distance of 60.0 cm. Find the position at which a third charge, of 14.0 ✕ 10^-9 C, can be placed so that the net electrostatic force on it is zero. -
## computer program

How do you design a program that asks for the sale figures, computes the total sales for the year, and calculates and displays final sale figures for the four quarters in 2010 and displays the average quarterly sale for the year? -
## Chemistry

What is the molar concentration of K4Fe(CN)6 solution if 40 ml were used to titrate 150 mg of Zn ( that are dissolved ) forming K2Zn3[Fe(CN)6]2 ? I really need help for this excersice , I don't know what to do... Note: In my book the answer is 0,0382 M -
## Chemistry

calculate the delta G^o and Kc for the reaction: 2Al + 3I2 = 2Al^3+ + 6I- -
## Chemistry

The delta G^o for a reaction : h2 (g) + i2 (g) = 2HI(g) Is 2.6 kj/moles. In one experiment the initial pressures are P h2 = 4.26 atm, P i2 = 0.024 atm, P hi = 0.23 atm. Calculate delta G -
## Chemistry

The delta G^o for a reaction : h2 (g) + i2 (g) = 2HI(g) Is 2.6 kj/moles. In one experiment the initial pressures are P h2 = 4.26 atm, P i2 = 0.024 atm, -
## stats

Consumer Reports rated airlines and found that 80% of the flights involved in the study arrived on time (that is within 15 minutes of scheduled arrival time). Assuming that the on-time arrival rate is representative of the entire commercial airline -
## science

2. Compare and contrast deductive reasoning and inductive reasoning. Based on the information given here, answer the following questions about the experiment: • What are the qualities of deductive reasoning? • What are the qualities of inductive -
## Math

Start at 500. Create a pattern that subtracts 4 from each number. Stop when you have 5 numbers. -
## Math

Store a has a promotion if you Bryce three shirts you get 25% off the total price of the three shirts store be has the same shirts on sale with a promotion that if you buy three shirts you get the third shirt on a 50% discount store see has the same shirts -
## math

If two trapezoids have the same perimeter do they have the same area? -
## English

What are some of the differences between old money and new money characters in the great gatsby? Is this distinction important in today's society? Why is the novel narrated from Nick's perspective? -
## Algebra

One number is 2/3 of another number. The sum of the two numbers is 40. Find the two numbers. Use a comma to separate your answers. -
## English

how does the history of the American Dream show a difference between our ideals and the reality of growing inequality and lack of social mobility. -
## Math

The ratio of blue to red cars in a parking lot is 4/7. If there are 168 blue cars about how many red cars are there? 4/7=x/168 672=7x x=96 -
## math- integral

Find the derivative of: G(x) = ∫(top x) t^5 sin(−7t−4)dt . (bottom 9) -
## Math

How do I find the value of sin ( A-B) When tan A= 4/3 Cot B= 5/12 -
## physic

Two currents from different sources flow in opposite directions through a resistor. I1 is measured as 79 mA on a 100 mA analog instrument with an accuracy of ±3% of full scale. I2, determined as 31 mA, is measured on a digital instrument with a ±100 µA -
## math

Find the degree 7 Taylor polynomial for f(x )= 2cos(3x) centered at x = 3π/2 . Thanks for your help -
## core mathematics

Two boats are 70m and on opposite sides of a lighthouse.from the two boats,the angles of elevation of the lighthouse are 71 and 45 respectively.find the height of the lighthouse. -
## Chemistry

Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid(HCN) and 0.150 M sodium cyanide (NaCN). The pKa of hydrocyanic acid is 9.31. What is the [HCN] after 0.020 mol of HCl is added? -
## alegebra

A study recently confirmed that of every 100100 citizens of a certain state, 6060 are considered overweight. There were 299299 million citizens of this state in 2001. How many would be considered overweight? nothing million citizens would be -
## Physics

How much does it cost to operate a 23-W porch light for 24 h if electric energy costs 8¢/kWh? -
## math

A college student takes a standardized test and scores a 163. If the mean is 155 and the standard deviation is 7, what is the student’s percentile rank? (Assume a normal distribution.) -
## Physics

1. Calculate the kinetic energy of a 5.2kg object moving at 2.4 m/s 7. Calculate the potential energy of a 5.2kg object positioned 5.8m above the ground 21. Calculate the speed of a 5.2 kg object that possesses 26.1 J of kinetic energy. -
## chemistry

a student performs the lab on an unknown metal and obtain the following data