# Annie

Newest questions posted by Annie-
## Geography

Which adaptions did early humans make during the last ice age in order to survive varied environments? Select all that apply. A. created religions to offer sacrifices to gods B. made shelters out of available materials C. worked in larger networks of -
## Math

What is the range of this data set? 27, 5, 11, 13, 10, 8, 14, 18, 7 A.22 B.7.5 C.11 D.16 -
## History

what idea emerged as a result of the protestant reformation is also reflected in modern democratic governments a. self-government* b. religious tolerance c. humanism d.censorship -
## Math

What is the unknown digit that makes the statement true? 2.48>2.4___1>2.463 -
## Chemistry

How much faster does nitrogen monoxide (NO) effuse in comparison to dinitrogen tetraoxide (N2O4) -
## Quadratic Functions and Equations

A field hockey tournament is to be held in Yellowknife, NWT. According to regulations, the field is 25 yards by 100 yards. For officials, support groups and team members, a uniform rectangular strip of manicured lawn is to be installed by a local business -
## physics 11

An arrow is shot horizontally towards a target 20 m away. In traveling the first 5 m horizontally, the arrow falls 0.2 m. In traveling the next 5 m horizontally, what will the arrow additionally fall? -
## Math

For some k>0 the lines 50x+ky=1240 and ky=8x+544 intersect at right angles at the point (m,n).find m+n. -
## Math

For some k>0 the lines 50x+my=1240 and my=8x+544 intersect at right angles at the point (m,n).find m+n. -
## Chemistry

Balance the following half-reaction under basic conditions. NO3^− → NH3 -
## Chemistry - Coordination Complex

Determine the number of unpaired electrons expected in terms of crystal field theory: a) [Fe(NO_2)_6]^3− b) [Fe(H_2O)_6]^3+ -
## social studies

what did the actions of the border ruffians demonstrate about the slavery debate? select all that apply a. that opposing sides would resort to violence b. that abolitionists would triumph by using the press c. that settlers would follow the laws d. that -
## Math

Need this answered today also explain the answers please Julia measured the high temperature in her town for one week. Using the chart below, find the mean absolute deviation for the high temperatures. Round your answer to the nearest tenth. Be sure to -
## Math

Evaluate: |4 - 8(3 - 12)| - |5 - 11| = -
## Spanish

Please help me work this out with the future verb tense. Completa el párrafo con el futuro de los verbos de la lista. No es necesario usar todos los verbos. asustarse casarse conseguir escribir estar hacerse olvidar ser tener terminar Nunca (1) ____lo que -
## Chemistry

Initial[A] Initial [B] Initial Rate, M/s .740 M .010 M 3.00e-10 .740 M .030 M 8.09e-9 .740 M .060 M 6.46e-8 .740 M .070 M 1.03e-7 What is the order of the reaction with respect to the concentration of B? -
## Math

For a population with a standard deviation of s = 12, a z-score of z = +0.50 corresponds to a score that is above the mean by 6 points. True or False -
## Math

A population with μ = 59 and s = 8 is standardized to create a new distribution with μ = 100 and s = 20. After the transformation, an individual receives a new score of X = 90. The original score for this individual was X = 51. True or False -
## Math

One method for correcting the bias in the standard error is to “pool” the two sample variances using a procedure that allows the bigger sample to carry more weight in determining the final value of the variance. True or false -
## Math

A repeated-measures research study comparing two treatments with a set of 10 scores in each treatment will produce a t statistic with df = 19. True or False -
## Math

A repeated-measures study and an independent-measures study both produce t statistics with df = 20. The independent-measures study used more participants. True or False -
## Math

The term correlation refers to a statistical technique that is used to ____. measure and describe the linear relationship between two variables measure the magnitude of a variable measure the significance of a variable measure the fit of a model -
## Math

The distance between the Y value in the data and the Y value predicted from the regression equation is known as the residual. What is the value for the sum of the squared residuals? SSresidual = r2(SSX) SSresidual = (1 – r2)(SSX) SSresidual = r2(SSY) -
## Math

A set of n = 15 pairs of X and Y scores has SSX = 10, SSY = 40, and SP = 30. What is the slope for the regression equation for predicting Y from X? 10/30 10/40 40/10 30/10 -
## Math

A set of X and Y scores has SSX = 20, SSY = 10, and SP = 40. What is the slope for the regression equation? 4.0 2.0 0.25 0.50 -
## Biology

Which of the following best explains the absence of fossil evidence from before the Cambrian at the time of Darwin? a) There were no animals b) The animals were very small c) The animals were soft and not likely to fossilize d) The animals were not in -
## Chemistry

Identify the longest, shortest, strongest, and weakest bonds? A. H3C-C---C-H B. (H3C-H)>---- -
## ELA

Replace the underlined definitions with these words. (icant really underline so i will just put quotations) WORDS: Navigate Altitude Destination Landmark Radar Bearing Propelling Equipped Transmitted Recurring Profited 1)The pilot, who never wore green, -
## ELA

Write the words that completes each pair of phrases. WORDS: Propelling Equipped Transmitted Recurring Profited 1) __ dreams, __ fever 2) __ for an expedition, __ for battle 3) __ from the experience, __ from your advice 4) __ the message, __ an electrical -
## world history

In Aztec society, women were (Choose all that are correct). -
## world history

Where were the Aztecs told to build their capital? -
## world history

What was the penalty for gossip in Aztec society? -
## world history

What did young men learn in Aztec public schools? Select all that apply. -
## Math

Stage 1: 1 = 1 Stage 2: 1+3 = 4 Stage 3: 1 +3+5 = 9 Stage 4: 1+3+5+7= 16 a. Find the next four stages and their sums. b. What is the sum in Stage 20? c. In what stage will the sum be 567? What is the greatest number added in the sum of this pattern? -
## Chemistry - Chemical Kinetics

Could you reduce the concentration of a reactant by one half in Experiments 2-4 and achieve the same purpose as doubling their concentration? Why or why not? (I want to say yes, because the ratios will still be the same. Would that be right?) Data for -
## Chemistry - half life

What is the half-life (in h) for the decomposition of O3 when the concentration of O3 is 2.37 ✕ 10−6 M? The rate constant for this second-order reaction is 50.4 L/mol/h. -
## Physics

A weight with mass m hanging from a ceiling is pulled so that the string is at angle θ from the vertical and remains stationary. Draw the force diagram for the mass m, label the forces and resolve them into their x- and y-axes components. Calculate the -
## Math

If two integers a and b have a product of 34. What is the least sum of a and b -
## physics

A 13.0 gram sample of an unknown metal at 30.0*C is placed in a Styrofoam cup containing 50.0 grams of water at 90.0*C.The water cools down and the metal warms up until thermal equilibrium is achieved at 87.0*C.Assuming all the heat lost by the water is -
## math

What is the area of a quadrilateral ABCD, if AB = 5 cm, BC = 13 cm, CD = 9 cm, DA = 15 cm, AC = 12 cm? -
## math

Given: ABCD is a parallelogram AM , BN − angle bisectors DM = 4 ft, MN = 3 ft Find: The perimeter of ABCD -
## math

A rhombus ABCD has AB = 10 and m∠A = 60°. Find the lengths of the diagonals of ABCD. -
## Rational number

7/11, -8/6, -6/8, 9/4, 27/25 arrange the rational number in ascending order -
## Maths

sarika prepared squash from tomato,carrot,apple juices. 1/3 of the squash was tomato juice and 2/3 of the remainder was carrot juice. 315 ml of squash vs carrot juice. what volume of the squash was apple juice? -
## Maths

kuldeep had a sum of money. He saved 1/4 of it. He spent 4/9 of the remaining on suitcase. a) What fraction of his money sent on suitcase? b) What fraction of his money was left? -
## Maths

A cylinder has volume 12cm^3. What will be the volume of a cone with the same base area and perpendicular height? -
## math

Given: ABCD is a rhombus, AB = 6, and m∠A=60° Find: The height. -
## math

It takes a ship 3 hours to cover 72 km with the current and 4 hours against the current. Find the speed of the ship in still water and the speed of the current. -
## math

A motorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hours. What is the speed of the boat in still water, if it covers 70 km with the current in 3.5 hours? -
## math

Two shelves contain 55 books. If half of the books from the second shelf were relocated to the first shelf, then the first shelf would contain 4 times more books than the second one. How many books are there on each shelf? -
## math

The sum of two numbers is equal to 63 and their difference is equal to 12. Find the numbers. -
## Algebra 2

Amelia is documenting the height of sunflower plants each week. She has determined the function to be f(x) = 3x + 3, where x represents time and f(x) represents the height of the plant. Which of the following options describes the restrictions to the -
## math

A diagonal of a parallelogram forms 25° and 35° angles with the sides of a parallelogram. Find the angles of the parallelogram. -
## math

In a class, every student knows French or German (or both). 15 students know French, and 17 students know German What is the smallest possible number of students in that class? -
## math

An old lady has 125 cats. Seven of them are old, 9 of them are her favorite, 5 of them are both (old and favorite). How many of them are neither old nor favorite? -
## Algebra With Pizzazz

I missed a week of school and I know nothing. Next thing I know we get page 163 and have to do everything on it. I don't know anything it's on System of equations substitutinal method. -
## Algebra

The value of a new car decreases by 35% in the first year. If a car costs $9,800 when new, how much less would it be worth at the end of the first year? -
## Chemistry

its takes 145 mL of zinc nitrate to react completely with 175 ml of 1.5 M potassium hydroxide. what is the concentration if zinc nitrate? -
## Calculus AB

What's the lim(x-->-infinity) sqrt(x^4-1)/(x^3-1)? I've tried solving for it but I got -1/0, which would make it undefined. Is that correct? -
## Calculus AB

So the problem is "For x>0, d(lnx)/dx = 1/x and lne=1. A) find the tangent line approximation for ln 3 B) calculate the %error in approximation in part A. My teacher said the answer for part A is that 1/e, and I'm pretty confused. So far I the given info -
## math2

When s is measured in meters and t is measured in seconds, find the velocity at t = 2 of the following a. s = t^2 + 3t b. s = t^3 - 3t^2 c. s = squareroot t + 2 Help plz -
## science(physics)

Why a minibus is more likely to topple over when the roof rack is heavily loaded than when the roof rack is empty? -
## Math

The population of a city has been decreasing exponentially since 1990. In 1990, the population was 1,000,000. In 2010, the population was 560,000. If t represents time in years since 1990, which of the following equations best models the decay of the -
## Calculus AB

Please help me with this WS 1) Find the value of lim as x-->-(square root of 3) of (-x^4 + 5x^2 -6)/(x+(square root of 3) 2) Find the distance between the discontinuities of g(x)= ((square root of x-4))/(x^2 -5x -1) 3)Find the value of x at which the curve -
## chemistry

Write a balanced equation for the reaction of liquid bromine with chlorine gas. -
## Calculus AB

Could someone please help me with these tangent line problems? 1) Find the equation of the line tangent to the given curve at the indicated point: 3y^3 + 2x^2 = 5 at a point in the first quadrant where y=1. 2) Show that there is no point on the graph of -
## science

a body of mass 10kg is moved in a vertical circle calculate tangential acceleration -
## Chemistry

Write mathematical equations that show how you will calculate the detected activity from the count rate due to background radiation and the sample of KCl and how you will determine the “true” activity of your sample from the detected activity. Use the -
## Calculus AB

I'm not sure how to go about this problem: Find the equation of the line tangent to the curve x^2 + 2xy + y^3 = 4 at y=1 in the 1st quadrant. -
## Calculus AB

There's these two word problems I don't understand. 1. A man 6 ft tall walks at a rate of 5 ft per second toward a streetlight that is 30 feet high. The man's 3-foot-tall child follows at the same speed, but 10 feet behind the man. a) Suppose the man is 90 -
## Chemistry

To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 18.5 g, and its initial temperature is -13.3 °C. The water resulting from the melted ice reaches the temperature of your skin, 28.4 °C. How much -
## English Lit

1. What pattern or structure is there to the development the the plot? Describe the way the events are organized. Is the structure significant to the meaning? "Car Crash While Hitchhiking" -Denis Johnson -
## Calculus AB

Um I don't really understand these word problems so could someone help me please? 1) An object is thrown upward with an initial velocity of 5 m/s from an initial height of 40 m. Find the velocity of the object when it hits the ground. Assume that the -
## Calculus AB

Sorry but I've got a lot of problems that I don't understand. 1) Let f(x)= (3x-1)e^x. For which value of x is the slope of the tangent line to f positive? Negative? Zero? 2) Find an equation of the tangent line to the oven curve at the specified point. -
## Calculus AB

Could someone please help me with this? Calculate the instantaneous rate of change of f at x=6. -
## Chemistry

Please write down the redox reactions (using the half-reaction method!) a)Cl2 from OCl- and Cl- in acidic solution b)Br2 from BrO3- and Br- in acidic solution -You don't have to do both, but could you help me step up the half reactions especially for OCl- -
## Algebra

solve for the negative value of x: I know if you solve for a positive value, the answer for x=13; but how to get the negative value. |2x-8|=18 -
## math

a recipe for fudge brownies calls for 3 5/8 cups of cocoa per bath. if you are making 2 1/2 batches, how many cups are needed? -
## Science

Mom:Circke face Dad: Oval face Son: ? what's the son genotype & phenotype? may someone give me an example and help me under this question, please. -
## math

Of 45 students 30 play badminton and 26 play tennis. Each student play either badminton or tennis,determine how many students play:(a)badminton only (b) tennis only -
## Math

How many fl oz would go pinto 6.5 -
## Calculus AB

Please help I'm stuck on this problem for the past hour. Define f(x)= { Ln lx-1l }/x A) show that f(c) is continuous at x=2 B)Where on the interval [-2,2] is f discontinuous? Show the work that leads to your conclusion. C) classify the discontinuities in -
## Social Studies

Which of the following was the provision in the Treaty of Paris in 1763? a. All French land in North America was to be given to England b. All French land in North America was to be given to Spain c. All French lands west of the Mississippi and Louisiana -
## Language Arts

Which of the following topics would be most appropriate for an autobiography narrative? A. your opinion of the opening ceremony at the Olympic Games B. your explanation of how to download MP3 files to your personal musical device C. your account of your -
## AP Biology

What are the phenotypes of the long-nosed cusimanse? I can't find any site about their body structure or function either. -
## Chemistry

If you are asked to make exactly 1.0 Liter of 0.80 M ZnCl2 solution, how many grams of zinc chloride would you need to be massed out? How do I go about solving this problem? -
## English

Read the following poem and then respond to the question below: “I’m Nobody! Who are you?” By Emily Dickinson I’m Nobody! Who are you? Are you – Nobody – too? Then there’s a pair of us! Don’t tell! they’d advertise – you know! How -
## Psychological

Which of the following statements regarding the nature of stress is true? A. Accumulating hassles may well lead to a sudden onset of PTSD. B. Psychophysiological disorders are primarily mental disorders. C. Continued exposure to stress is associated with -
## Math

For questions 3 and 4, simplify each expression. 1. 4^4/4^6 -16 16 1/16 -
## Math

Write each expression using a single exponent 1. x^9/x^2 a)x^11 b)x^7 -
## physics

An insulated beaker contains 300g of water initially at 30 degree celsius. water at 100 degree celsius is added until the temperature of mixture reaches 50 degree celsius . the specific heat capacity of water is 4.2J/(kg degree celsius). how much water is -
## Algebra

A chemist mixed a 70% alcohol solution with a 30% alcohol solution to make a 45% alcohol solution. How many liters of each were used to make 120 L of a 45% solution? I tried solving this with elimination method and made two separate equations. For -
## Math Help- Areas!!!!

For problems 4-5, find the surface area of the cylinder in terms of pi. (cylinder is 18 cm high and 14 cm wide) A. 350 pi cm2 B. 896 pi cm2 C. 602 cm2 D. 644 pi cm2***? (cylinder is 20 inches high and 18 inches wide) A. 396 pi in2 B. 522 pi in2 C. 360 pi -
## Trigonometry and Right Triangles!

The length of the hypotenuse of a 30 60 90 triangle is 16. What is the perimeter? I'm just learning about this. Can someone explain? -
## Math Help!!!

How do I solve for sin24=CD/BC if BC is 15,052.07464? Thanks! -
## physics

on the road with Kate. If she is driving a 2500kg car going 75km/h a)how much kinetic energy will it process. b)She asks "How high would I have to lift the car for the same amount of potential energy"? converting 75km/h to m/s -
## science

The cohrence length of a light source is 2.45×10raise to power-2 calculate width of spectral line -
## science

write down the possible terms of one electron system corresponding to n=2 -
## science

find the energy of first excited state of helium -
## math

Write the following sets in set. Builder notation. B is the set of even natural numbers greater than 15 and smaller than 29