# becca

Newest questions posted by becca-
## Math

How do you evaluate 16(2^-3 - 4^-2)? -
## Math

The dome over the town hall has a parabolic shape. I measure 48 m across and rises 12 m at its center. Determine the quadratic equation that models the shape of the parabola. I have learned the formula y = a(x-s)(x-t). -
## Statistics

In a study of MP3 player popularity, 22% of people in a random sample of 1100 Americans age 12 and older indicated that they owned an MP3 player. The owners were 26% of the males and 18% of the females. Suppose that there were the same number of males and -
## Math

In the Doubles Game, students can win carnival tickets to spend on games and food. A player pays one ticket to roll two number cubes(six-sided dice). If the numbers match, the player wins five tickets. If a player plays this game 20 times, about how many -
## Calculus I

A particle on the x-axis is moving to the right at 2 units per second. A second particle is moving down the y-axis at the rate of 3 units per second. At a certain instant the first particle is at the point (5,0) and the second is at the point (0,7). How -
## Elementary Statistics

Ten horses are entered in a horse race. How many permutations of 1st, 2nd, and 3rd place winners are there? -
## Chem

Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)? -
## K12

Is anyone in K12 here or FLCCA that could help me in Algebra 2??? -
## Math

the top of a rectangular table has a length that is two times it's width. The perimeter of the tabletop is 144 inches. What is the width of the tabletop? -
## Chemistry

What is the value of [h3o] in a solution where [oh]=4.20x10^-6 -
## Social Studies

Why did Adams increase the size of the American Navy? He wanted to prepare for all-out war on Britain He hoped it would deter more attacks by French ships He needed to use tax money to fund an increase in military spending Congress passed a law that -
## chemistry

Find the molar solubility of BaCrO4 (Ksp= 2.1 × 10−10) in 3.5 × 10−3 M Na2CrO4 -
## Physics

Two positive charged spheres, one with 2 times the charge of the other are 38 cm apart. The net force between them is 0.77 N. What is the charge on the lesser charged sphere? -
## Math

The ratio of the length of a rectangle to the width of a rectangle is 5:2 if the link is 45 centimeters what is the width of the rectangle in centimeters -
## Spanish

PLEASE HELP!! I'm confused because I know that the conjugated form for "yo" is digo, but I think it might be decir also because its translated as I have to tell the truth, and decir means "to tell." Yo tengo que _______ la verdad. decir dicen decimos digo -
## Geometry (PLEASE HELP!!!)

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it -
## Geometry

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it -
## Physical Science

Please check my answer!! I would be great if you could explain this to me a little as well... To find the amplitude, measure_____ a. the horizontal distance between consecutive positions b. the horizontal distance between a consecutive crest and trough c. -
## English

Please help me with these question about Romeo and Juliet!!! They really are confusing me!! 1. In act 4 scene 1 of Romeo and Juliet, Paris tells Friar Laurence, "Immoderately she weeps for Tybalt's death, / and therefore have I little talked of love." What -
## Trigonometry

PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not -
## English

PLEASE HELP!!! Please check my answers!! I'm not sure about a few of them, but i marked the answers that I think are correct. 1. In Act IV of Romeo and Juliet, what is Friar Lawrence’s advice to Juliet concerning her parents’ wishes that she marry -
## English

PLEASE HELP!!! I'm really confused about these question from Romeo and Juliet... I marked the answers that I "think" are right but I'm not sure. Please tell me which ones i got wrong and the correct answer!?!?! 1. Why doesn’t Juliet want to marry Paris? -
## Math

A girl stands 7 meters away from a building. The angle of elevation from where she stands is 25 degrees. How tall is the Building? -
## Physics

Please check my answers!! 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? I got 2223.375 Joules after Damon -
## Physics

Please help me with this!! I am really confused about it... 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? -
## economics

Which goods would be included in the calculation of GDP? A. toys made in China at a factory owned by a U.S. company B. cars made in Tennessee at a factory owned by a Japanese car company C. plastic made in Kentucky and sold to a toy maker in Ohio D. cotton -
## Math

Lucy spends 4 hours a week babysitting.Her Sister Lily spends 7/8 as much time babysitting. Does Lily babysit for more or less than 4 hours? 7/8•4= 20/32 But then how do I break that down ? -
## English 9

Please give me some advice!!!! Compare and contrast the poem "Mexicans Begin Jogging" to the story "Delfino II: Diez in the Desert". Both are written about similar themes, immigration, but the story has a more serious mood than the poem. ******** Both -
## English grammar.

Please check my answer! What is the capitalized phrase? TO SCORE ACCURATELY, bowlers must learn what the terms spare, strike, and split mean. Infinitive phrase**** Gerund phrase Adverb phrase none of the above I though that the capitalized phrase was an -
## Social Studies

Which of these factors MOST shaped American identity? A: The United States is located in North America. B: Aristocratic royal governors oversaw the earliest British colonies. C: Early colonists grew cash crops and replied on natural resources to survive. -
## Chemistry

A solution is prepared by dissolving 0.1 mol of ethanoic acid (CH3COOH) in 500ml of water at 25 C. pKa of ethanoic acid is 4.7. What is the pH of the solution? I'm assuming the equation is pH = pKa + log[Base]/[Acid] but can't get it to work? -
## Statistics

How do you find the p-value??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the -
## Chem

You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.7 mL left (the rest had evaporated). In addition, you forgot the initial concentration of the solution. You decide to -
## Inorganic chem

What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle? -
## Chemistry

For another picnic, you want to make hamburgers with pickles, again without having any left over. You need to balance the number of packages of buns (which usually contain 8 buns) with the number of packages of hamburger patties (which usually contain 12 -
## algebra 1

A town is organizing a parade. There will be floats of only 2 sizes, 30ft. and 15ft. A space of 10 ft. will be left after each float. a. the parade must be at least 150 feet long, but less than 200ft long. what is the combinations of large and small floats -
## algebra 1

You have $100 to go shopping. A store sells shirts for $15 and dress shirts for $22. You want to spend no more then the amount of money you have. You want to leave at most $10 unspent. you need to buy at least one dress shirt. What are all the possible -
## Multiplying Polynomials

Use the distributive property to write (each of) the following expression(s) as the sum of monomials. M. (t - 1)(t + 1)(t^2 + 1) I already know that I must multiply across, but I am a bit confused regarding the order to multiply in and which variables to -
## Physics

As part of a safety investigation, two 1200kg cars traveling at 24m/s are crashed into different barriers. Find the average force exerted on the car that hits a concrete barrier and takes 0.16s to stop. -
## Math

Seth had a bag with 4 green, 5 yellow, and 6 blue marbles in it. If Seth draws a yellow marble and does not replace it, what is the probability that the second marble he draws is yellow? -
## Math

My locker combination has three digits. None of the digits are 0. What is the probability that the first digit of my locker combination is less than 3? -
## Algebra

What are two numbers that add to 615 but multiply to -90000? I'm trying to factor the quadratic x^2+615x-90000 -
## Physics

An artillery shell is fired at an angle of 67.4◦ above the horizontal ground with an initial speed of 1560 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell, neglecting air resistance. Find its horizontal -
## physics

98. On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.) 99. If you drop an object, its -
## algebra

Determine the value of each expression 25% of 200 -
## English

How could you use the words feel and turn as a linking verb? -
## physics

A vertical scale on a spring balance reads from 0 to 220N . The scale has a length of 15.0cm from the 0 to 220N reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.45Hz . Part A Ignoring the mass of the spring, -
## Physics

The equation of motion for an oscillator in vertical SHM is given by y=(0.60m)sin[(130rad/s)t]. Part A What is the amplitude of this motion? Part B What is the frequency of this motion? Part C What is the period of this motion? -
## Materials Transport

You have a kiln where theinterior is a cube with an edge length of 30 cm. The walls of the kiln are made of an insulating refactory, and are 10 cm thick. The thermal conductivity of the refractory is .06 W/mK. The interior of the kiln is at a temperature -
## physics

A 72.5 kg skier is going straight down a 31.1o slope. Each ski has a contact area with the snow of 0.137 m2. Calculate the pressure that the snow exerts on each ski. -
## College anatomy

It was observed that blood glucose levels were falling in an individual. This event would be sensed by (a) cells in the (b) of the pancreas, causing them to release the hormone (c). This series of events would be part of an (d) loop/mechanism, serving as a -
## chemistry

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol) -
## chemistry

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol) -
## chemistry

Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol) -
## physics

A merry-go-round makes 23 revolutions in a 2.8min ride. Part A What is its average angular speed in rad/s? -
## physics

The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 14m/s in a circle with a diameter of 100m . Part A Through what angular distance does the car move in 4.00min ? -
## physics

A baseball player pops a pitch straight up. The ball (mass 230g ) was traveling horizontally at 36.0m/s just before contact with the bat, and 21.0m/s just after contact. Part A Determine the magnitude of the impulse delivered to the ball by the bat. Part B -
## physics

How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500? -
## physics

The acceleration due to the moon's gravity at its surface is less than what it is here on the surface of the earth. The computed value of 1.6 m/s2 is consistent with what the Apollo Program astronauts observed during their explorations there. Imagine an -
## Stats

For X ∼ Poi(λ), show that E(X) = λ and V ar(X) = λ. (Hint: Find E[X(X − 1)] = E(X2 ) − E(X).) -
## Stats

The Geometric distribution is used when we want to ﬁnd the probability of performing a sequence of trials with X “failures” before the ﬁrst “success”, where a “success” occurs with some probability p. We can denote such a random -
## human resources

What is the difference between executive pay and non executive pay and controversies are associated with the disparity between them? -
## math

Find the area of the segment of the circle. Leave your answer in terms of pi. there is a circle with a shaded area that has a 90 degree triangle in it and a 3 next to one soide of the triangle -
## social studies

Why did pilgrims travel? a. to fight a holy war b. to organize followers c.to pay tribute to a king d. to visit holy places -
## Calculus please help !

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2). -
## Pre-calculus HELP PLEASE !

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2). -
## Algebra

Two questions I need help with. Find the indicated partial sum using the information given. 1. a3=4/9, a7=9/64, S6 Determine wheater the infinite geometric series has a finite sum 2. 6+ 3+ 3/2 + 3/4 +.... 3. -49 + (-7) + (- 1/7) +... -
## Help! Algebra

Find the common ratio r and the value of A1 with the information given. 1. A3=324 A7=64 2. A4=32/3 A8=54 -
## Math

If the floor plan of a new building is shown the building cost $35.00 a saqure foot to construct you need to obtain insurance for the new building .how much insure? -
## Reiny please help!Algebra

I need help with these! I got B for 1. C for 2. and D for 3. Thanks for the help! 1.) Find the values of a, b, and c that will make the statement true. [5 a -2] [5 102] [3 4 –b] = [-3 -4 3] [2c 5 9] [-2 5 9] a.) 8R1-R2--> =R2 b.) -8R1-R2 -> =R2 c.) -
## Algebra multiple choice!

I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give -
## Algebra help!

1.) Solve the system by triangularizing the augmented matrix and using back substitution. -x-y+z=1 x-y-4z=-7 4x+y+z=6 2.) Perform the indicated row operation, then write the new matrix. -4 4 | 4 9 -6 | 5 -2R1+ R2 ---> R2 3.) Solve the system by -
## Pre-calculus; urgent ! Please help !

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y -
## Calculus please help !

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y -
## Math ! Please Help !

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y -
## Thermodynamics

The initial state consists of a closed system containing one mole of super-heated liquid water at 115°C and 1 atmosphere pressure. The immediate surroundings are also at 115°C and 1 atmosphere pressure. The change in state is described as this one mole -
## Calculus please help !

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular. -
## Math ! Please Help !

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular. -
## Pre-calculus; urgent ! Please help !

Find the inner product of a and b if a= (3, 0, –1) and b= (4, –2, 5), and state whether the vectors are perpendicular. -
## Math

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over -
## Calculus

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over -
## Math

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over -
## Pre-calculus

1. A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? 2. What point represents a reflection of B over -
## Pre-calculus

Jana hit a golf ball with an initial velocity of 102 feet per second at an angle of 67° with the horizontal. After 2 seconds, how far has the ball traveled horizontally? -
## Math

What is 2.49 divided by 89?(BTW im not cheating im just having trouble checking my answers -
## science

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard -
## business

describe how a manager would use the critical-incident appraisal method for assessing an employee? -
## Algebra

I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of -
## Algebra

Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would -
## Algebra

I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of -
## Math, need help asap

The ramp shown below is used to move crates of fruit to loading docks of different heights. When the horizontal distance AB is 12 meters, the height of the loading dock, BC, is 4 meters. What is the height of the loading dock DE? 12 m 8 m 9 m 15 m -
## Physics

A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver comes to a stop 2.7 m below the water's surface. What is the magnitude of the force exerted by the water on the swimmer. (assume a positive direction is up) I calculated the force on the -
## Physics

A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver comes to a stop 2.7 m below the water's surface. What is the magnitude of the force exerted by the water on the swimmer. (assume a positive direction is up) I calculated the force on the -
## physics

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point? -
## AP Environmental Science

Consider the following heats, copper: 0.384J/g degrees, glass:0.502J/g degrees, water: 4.18J/g degrees, and lead:0.159J/g. Which substance once warmed, would be more likely to maintain its heat and keep you warm through a long party on a cold night? -
## math

how do u reduce 8 gal 9pt -
## Biology

some proteins (such as HBB) can vary quite a bit from species to species. others (ex., tubulin) vary little from species to species? Why? -
## Physics

Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the -
## Scirnce/ math

If a pinecone was thrown from a height of 45 meters and hit the ground 4.5 seconds later, how fast was the pinecone traveling -
## Chemistry

How do you figure out how mch oxygen gas escaped when Potassium Chlorate is decomposed in a reation? Also what mass of Potassium Chlorate was decomposed in the experiment? I conducted the experiement but don't know how to do this.