# alyssa

Most popular questions and responses by alyssa-
## Language arts

What is the name of the online textbook used in this course A) Language arts B) The big question C) Literature D) Write to learn

*asked on January 25, 2017* -
## Physics

A black mamba snake has a length of 4.3 m and a top speed of 8.9 m/s! Suppose a mongoose and a black mamba find themselves nose to nose. In an effort to escape, the snake accelerates at 20 m/s2 from rest. (a) How much time does it take for the snake to

*asked on August 29, 2015* -
## Algebra 1

Just checking my answers. What is the sum or difference? 1. 2x^4 - 8x^4 A. -6x^8 B. -6x^4*** C. -16x^4 D. -16x^8 What is the sum or difference 2. 10y^10 - 14y^10 A. -4y^20 B. -140y^20 C. -140y^10 D. -4y^10*** 3. Write the polynomial in standard form. Then

*asked on October 24, 2016* -
## Chemistry

net ionic equation to show that sulfurous acid, H2SO3, behaves as an acid in water. I got this answer but do not know if it is correct. H2SO3 + H2O --- H3O + SO I am Not sure if its is tri/mono/diprotic

*asked on April 30, 2017* -
## AP Calculus

In the answer space below, provide the larger of the two positive integers that add up to 60 and have the largest possible product.

*asked on October 16, 2014* -
## AP Calculus

If 600 cm2 of material is available to make a box with a square base and a closed top, find the maximum volume of the box in cubic centimeters. Answer to the nearest cubic centimeter without commas. For example, if the answer is 2,000 write 2000.

*asked on October 16, 2014* -
## science

1.Darwin assumed that evolutionary change was always slow and gradual. What was the first evidence that suggested evolution change might happen fast sometimes? A. Homologous structures B. Fossils*** C. Reproduction rates D. DNA sequences 2.Which of the

*asked on October 9, 2014* -
## algebra

Combine like radical terms -7\sqrt(6-5 ) \sqrt(54)

*asked on May 4, 2017* -
## History

Which accurately describes Isaac Newton’s clockwork universe theory? A. It compares the universe to a mechanical clock wound up by God, with its gears governed by the laws of physics. B. It compares the universe to London’s Big Ben clock tower,

*asked on April 8, 2019* -
## physics

the muzzle velocity of a 50.0g shell leaving a 3.00kg rifle is 400 m/s what is the recoil velocity of the rifle

*asked on December 16, 2012* -
## Math

lucky drew an isosceles triangle as shown if the measures of XYZ is 25 what is the measure of XYZ

*asked on February 14, 2017* -
## Chemistry

Two moles of a nonelectrolyte solute are dissolved in 1 kg of an unknown solvent. The solution freezes at 7.8 degrees Celsius below its normal freezing point. What is the molal freezing point constant of the unknown solvent? What is your prediction for the

*asked on May 17, 2010* -
## Science

what geographical features create natural boundaries for water to flow toward one ocean or another?

*asked on September 21, 2016* -
## Math

A company did a quality check on all the packs of trail mix it manufactured. Each pack of trail mix is targeted to weigh 9.25 oz. A pack must weigh within 0.23 oz of the target weight to be accepted. What is the range of rejected masses, x, for the

*asked on October 28, 2017* -
## Math

Which equation can be used to find the measure of an angle that is supplementary to POS

*asked on February 15, 2017* -
## calculus

the area of the first quadrant bounded by the y-axis, the line y=4-x, and the graph of y=x-cosx is approximately

*asked on February 26, 2012* -
## Spanish

I have to answer negatively. ¿Podemos ir a la playa o nadar en la piscina? I answered.. No, no podemos ir a la playa ni nadar en la piscina. But it says there is a word missing between podemos and ir. I tried.. No, no podemos no ir a la playa ni nadar en

*asked on March 16, 2017* -
## History

Which best describes the Vatican’s relationship with Spain during the 15th century? A) Spain was fervently Catholic and Spanish gold raised numerous buildings in Rome. B) Spain and the Vatican formed the Schmalkaldic League to fight the French. C) Spain

*asked on March 26, 2019* -
## Math

How many 1 inch squares can be cut from an 18"x24" piece of contruction paper

*asked on October 27, 2015* -
## Nassau

The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. The area of the shaded region is 86 square inches. What is the area of the

*asked on August 4, 2011* -
## algebra

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 +

*asked on April 5, 2011* -
## History

Which best describes the beginning of the American Revolutionary War? A. Great Britain and France declared war, known as the French and Indian War. B. American colonists fought the British at the Battles of Lexington and Concord. C. Great Britain signed

*asked on April 9, 2019* -
## History

Which most accurately describe humanist artistic innovations during the Renaissance? (Select all that apply.) Characters in medieval paintings were two-dimensional and unproportioned, while Renaissance paintings were lifelike and realistic. Nude paintings

*asked on March 22, 2019* -
## Pre-Calc

I am really struggling with how to do these problems, I posted them a few minutes ago but the answers/work shown was incorrect. 1) a) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. cos 12° cos

*asked on April 13, 2015* -
## Geography

What is absolute location? A. a precise measure of where a location falls in terms of longitude and latitude using units such as minutes and seconds B. a precise measure of distance around the equator C. a more precise measure of where a location falls in

*asked on January 28, 2018* -
## Chemistry

Given that HSO4- is a stronger acid than HPO4^2-, what is the chemical reaction if solutions containing these ions are mixed together? (Hints: One of these must act as an acid and the other as a base. Use the Brønsted-Lowry definition) Please explain how

*asked on May 9, 2017* -
## Chemistry

A sample of nitrogen gas occupies 1.55 L at 27oC and 1 atm pressure. What will the volume be at -100oC and the same pressure?

*asked on February 9, 2011* -
## Chemistry

help please! At 2200°C, K = 0.050 for the following reaction. N2(g) + O2(g) 2 NO(g) What is the partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.75 atm and 0.30 atm, respectively?

*asked on November 18, 2010* -
## chemistry

When 47.5J of heat are added to 13.2 g of liquid, its temperature rises by 1.72 degrees C. What is the heat capacity of the liquid? A cook wants to heat 1.35kg of water from 32.0 degrees C to 100 degrees C. If he uses combustion of natural gas to heat the

*asked on September 21, 2012* -
## Chemistry

Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more compli- cated, but this is a reasonable first approxima- tion.) The combustion of carbon is described by the equation C(s) + O2(g) −→ CO2(g) ∆H◦ = −394 kJ What is

*asked on May 22, 2014* -
## Social Studies

Choose the teachings of Confucius that created Confucianism. Select all that apply. burning paper money the way yin and yang 5 relationships Honoring Elders severe punishments filial piety I think it is 5 relationships and the filial piety

*asked on November 28, 2018* -
## Pre-Calc

1) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. cos 12° cos 18° − sin 12° sin 18° And Find its exact value. 2) Use an Addition or Subtraction Formula to write the expression as a

*asked on April 13, 2015* -
## History

Mark the statement if it describes Roman society during the time of Cincinnatus. A. Rome’s government was based on law in which many people had a voice. B. Rome was being surrounded and threatened by outside forces. C. People in Rome admired those who

*asked on April 23, 2014* -
## physics

A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900kgm^2. A child pushes the merry-go-round with a constant force of 80 N applied at the edges and parallel to the edge. A frictional torque of 12 Nm acts at the axle of the

*asked on October 17, 2010* -
## Physics

Two resistors 10ohms and 5ohms are connected in parallel across a 15V battery. What is the potential difference across the 10ohms resistor. I do not need the answer just the formula and how to figure out the problem. Thanks.

*asked on August 3, 2014* -
## Biology

How are decomposers like a city's recycling center?

*asked on September 25, 2012* -
## science

3.If a gap in the fossil record exists between ancient and modern forms of a species, which of the following is the most appropriate conclusion? A. The gap indicates that gradualism must have occurred for the species to evolve from ancient to modern

*asked on October 9, 2014* -
## Social studies

how did northern and southern responses to the fugitive slave law affect their relationship? A.it deepened on fear and anger B.it deepened the commitment to compromise C.it encouraged northern commitment to end plantation life D.it encourage southern

*asked on January 29, 2015* -
## Physics

A spring that has a spring constant of 150 N/m is oriented vertically with one end on the ground. (a) What distance does the spring compress when a 4-kg object is placed on its upper end? in m. (b) By how much does the potential energy of the spring

*asked on October 23, 2015* -
## Physics

A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the

*asked on February 17, 2013* -
## Chemistry

What mass of electrons would be required to just neutralize the charge of 3.9 grams of protons?

*asked on October 14, 2010* -
## math grade 10 math

A map shows a main gas pipeline running straight from A(45,60) to B(65,40) a) Is the point C(63,54) on the branch pipeline? Explain your reasoning b) What is the shortest route for connecting point C to the main pipeline.Explain **OMGGGG PLZZZ HELPPP,

*asked on December 23, 2009* -
## Economics

What do most economists believe about the future of business cycles? A. Business cycles will grow more extreme, with higher peaks and deeper troughs. B. Advances in technology have brought business cycles to an end. C. Business cycles will continue to

*asked on April 19, 2009* -
## Biology (PLZ HELP)

Researchers discovered that zooplankton in Narragansett Bay now graze on floating algae more actively through the winter than they ever did before. What effect do you think this might have on the annual late-winter "bloom" of algae that occurs in the

*asked on September 25, 2012* -
## grade 10 math- slope/midpoint/length formulas

A map shows a main gas pipeline running straight from A(45,60) to B(65,40) a) Is the point C(63,54) on the branch pipeline? Explain your reasoning b) What is the shortest route for connecting point C to the main pipeline.Explain **OMGGGG PLZZZ HELPPP,

*asked on December 23, 2009* -
## Physics

Determine the magnitude and direction of the displacement if a man walks 32.5 km 45° north of east, and then walks due east 19.5 km.

*asked on September 28, 2010* -
## Math

write a rule to describe the translation of a point from (-3 3) to (-2 2) A)

*asked on April 5, 2017* -
## Math

Samantha wants to buy 6 roses 4 carnations and 8 tulips she estimates that she will spend about 14 dollars on these flowers do you agree math chapter 5

*asked on December 1, 2014* -
## AP ENGLish

Many plays and novels use contrasting places (for example, two countries, two cities or towns, two houses, or the land and the sea) to represent opposed forces or ideas that are central to the meaning of the work. Explain this contrast within the play,

*asked on January 16, 2017* -
## physics

A point charge of +1 µC is located at x = −2 cm and a second point charge of −8 µC is located at x = 6 cm. Where should a third charge of +1 µC be placed so that the electric ﬁeld at x = 0 cm is zero?

*asked on January 15, 2013* -
## Social studies

The Macdonald-Cartier bridge that stretches the Ottawa River and connects Ontario to Quebec is named for two Canadian politicians, one ______ and one _______. A)English, German B)Inuktitut, French C)French, Cree D)English, French

*asked on March 17, 2017* -
## History

What text from China was introduced to India during the Age of Discovery and meshed well with Hindu beliefs? A) Thirty-Six Stratagems B) The Methods of the Sima C) Art of War D) I Ching I think it's D?

*asked on March 27, 2019* -
## Physics

A box is on a flat plane and has a force of 16 N applied downward to it at an angle of 55 degrees. The box has a mass of 28 kg. What is the minimum horizontal force F needed to make the box start moving in (Figure 1)? The coefficients of kinetic and static

*asked on October 6, 2017* -
## socials 11 (post war 1946-1980)

what was the extent of Canada's involvement in the Marshall Plan?

*asked on July 17, 2013* -
## math

The markup on a restaurant mean is 250%. A meal costs $7.25 to produce. How much will the customer be charged, after markup and 5% GST are applied?

*asked on July 4, 2013* -
## chemistry

How many moles of Pb(SO4)2 are equivalent to 157.9 g of Pb(SO4)2 (Mw. 399.34 g/mol)?

*asked on October 29, 2017* -
## statistics

A manufacturer of cell phones has decided that an assembly line will be considered to be operating satisfactorily if less than 0.02% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly

*asked on February 22, 2012* -
## chemistry

What pairs of ions produce similar colours in the flame test? Use your periodic table of elements to explain the reason for this. The pairs with similar colours were Ba2+ and Cu2+, and Sr2+ and Li+. Ba and Cu had light green-ish colours, and Sr and Li had

*asked on February 17, 2015* -
## Elective Child Daycare Management

1. Which one of the following statements uses language best to present a clear picture of a child's behavior? A. Leslie ran to the door, greeting his mother with open arms. B. Carolyn carried her books to the table. C. Marshall handed the truck to Jacob.

*asked on June 18, 2010* -
## physics

A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?

*asked on November 3, 2012* -
## Physics

Charge A, +1 μC, is positioned at the origin of a coordinate system as shown below. Charge B, −1 μC, is fixed at x = 3 m. (a) Determine the magnitude and direction of the force that charge B exerts on charge A. (b) What is the force that charge A

*asked on January 29, 2016* -
## chemistry

the closeness of a measurement to its true value is a measure of its________. percent error?

*asked on September 30, 2007* -
## Geometry

If the length of one base of a trapezoid is 5, the length of the other base is 2x + 7, and the length of the midsegment is 6x – 24, what is the value of x? Show equations and all work that leads to your answer.

*asked on January 22, 2010* -
## AP human Geo

Which of the following maps would be likely to use a larger-scale to represent distance? -A map of the country of Saudi Arabia -A map of Albuquerque, New Mexico -A map of the continent of South America -A map of the world -A map of the European Union

*asked on June 29, 2019* -
## 4 grade math

Find two mixed numbers so that the sum is 15 3/10 and the difference is 8 5/10

*asked on May 21, 2013* -
## Physics

A student pushes stright along the handles of a mower with a force of 200 N. The handles make a angle of 20°, with respect to the horizontal. The frictional force for the 25 kg mower is 100 N. What is the normal force on the mower, and what is the

*asked on October 31, 2012* -
## Calculus ll - Improper Integrals

Find the area of the curve y = 1/(x^3) from x = 1 to x = t and evaluate it for t = 10, 100, and 1000. Then find the the total area under this curve for x ≥ 1. I'm not sure how to do the last part of question ("find the the total area under this curve for

*asked on October 2, 2010* -
## Science

How do seismologists locate the epicenter of earthquakes?

*asked on May 19, 2019* -
## Physics

At t=0 a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction, its acceleration is given by a=3i-2j m/s^2 At the instant the particle reaches its maximum y coordinate, how far is it from the origin? I'm not sure how to do a

*asked on October 17, 2015* -
## AP chemistry

001 (part 1 of 2) 10.0 points A 1.37-gram sample of compound X (of MW 88.0 g/mol) was burned in a bomb calorime- ter containing 1700 g of water. A temperature rise of 0.95◦C was observed. ∆Erxn for this re- action is −475 kJ/mol of X. What is the

*asked on October 27, 2013* -
## biology

why is anaphase the shortest stage in the cell cycle?

*asked on October 14, 2015* -
## 4th grade math

Find two mixed numbers so that the sum is 8 4/8 and the difference is 2 2/8

*asked on May 21, 2013* -
## Physics

When a 9.00 kg mass is placed on top of a vertical spring, the spring compresses 4.5cm, FIND THE FORCE CONSTANT OF THE SPRING.

*asked on November 29, 2009* -
## Math

PLEASE SHOW YOUR WORK.. Marty paid $72 for a jacket that had been marked down 20%. Create a linear model to represent this and use it to calculate the original price of the jacket.

*asked on January 21, 2015* -
## Chemistry

Given that the vapor pressure of water is 17.54 Torr at 20 °C, calculate the vapor-pressure lowering of aqueous solutions that are 1.90 m in (a) sucrose, C12H22O11, and (b) aluminum chloride. Assume 100% dissociation for electrolytes. I got .5799 Torr for

*asked on March 26, 2014* -
## Physics

(a) Estimate the positive charge in you due to the protons in the molecules present in your body. (Assume that the human body is made entirely out of water.) (b) What is the net charge in your body?

*asked on January 29, 2016* -
## math

The stopping distance of a car traveling 25mph is 61.7ft, and for a car traveling 35mph it is 106ft. The stopping distance in feet can be described by the equation y=ax^2 + bx + c, where x is the speed in mph. Find the values of a and b.

*asked on October 21, 2011* -
## pre-algebra

Wel-min makes a square quilt that has an area of 100 square feet.It has 25 square blocks, each the same size. What is the legth of each side of a block? A-2 feet B-4 feet C-6 feet D-10 feet

*asked on October 30, 2014* -
## Chemistry

Explain why the FeCl3-KCI-HCl solution was used as a reference solution. Suggest a procedure you could follow to determine whether it was necessary to use this solution as a reference or whether distilled water would have been just as satisfactory.

*asked on July 10, 2013* -
## physics

The three ropes are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown: F=85 N, q=54°. What is the magnitude of the tension force in the first rope

*asked on January 31, 2011* -
## 9th grade chemistry

Is the name for CuH2PO4 copper dihydrogen phosphate? I don't really understand the ones with the H2 in them... thanks

*asked on December 4, 2008* -
## Math

To study the efficiency of its new price-scanning equipment, a local supermarket monitored the amount of time its customers had to wait in line. The frequency distribution in the following table summarizes the findings. Find the standard deviation of the

*asked on April 15, 2017* -
## science

I have a question from an old exam that I need help to understand, i'm not sure where to start An electron in an electronically excited hydrogen atom undergoes a transition from a 6d to a 2p orbital, resulting in the emission of a photon. The photon

*asked on October 16, 2015* -
## math

Daphne gave away 3 more than half her apples. She gave away 17 apples in all. how many apples did she have originally?

*asked on September 22, 2014* -
## Physics

A 14.1 μF capacitor is charged to a potential of 45.0 V and then discharged through an 80.0 Ω resistor. (a) How long after discharge begins does it take for the capacitor to lose 90.0% of the following? (i) its initial charge in seconds (ii) its initial

*asked on February 18, 2016* -
## Biology

What are the differences between reflex (involuntary) actions, and voluntary actions in terms of the way nerve impulses are transmitted through the neurones? For instance, i know that in a reflex action, say, a prick of the needle on your hand, will

*asked on July 25, 2009* -
## American History

What policies did Teddy Roosevelt pursue? Which policies were successful? Which policies were not successful?

*asked on November 5, 2018* -
## algebra

Ed Moura has $21000 invested in stocks paying 8%. How much additional money should he invest in certificates of deposit paying 4% so that the average return on the two investments is 5%?

*asked on March 12, 2015* -
## Physics

A car goes around a curve on a road that is banked at an angle of 30 degrees. Even though the road is slick the car will stay on the road without any friction between its tires and the road when its speed is 24.0 m/s. WHAT IS THE RADIUS OF THE CURVE?

*asked on November 29, 2009* -
## College Physics Question

The position of a ball as a function of time is given by x=(5.3m/s)t + (−11m/s^2)t^2 What would be the acceleration of the ball, and the velocity from t=0 to t=1s ?

*asked on September 17, 2017* -
## PhysicsIn what direction relative to north must ca

Two canoeists start paddling at the same time and head toward a small island in a lake, as shown in the figure . Canoeist 1 paddles with a speed of 1.60 at an angle of 45 north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5

*asked on February 9, 2012* -
## 5TH grade math

estimate each sum or differnce. 7.4 + 3.1+ 9.8 How do I do this?

*asked on August 25, 2011* -
## Science

why is burning magnesium an irreversible reaction?

*asked on October 3, 2014* -
## Chemistry

calculate the natural logarithm and reciprocal concentration at 0 seconds and NO2 concentration (M) of .8333 and at time 20 (seconds) and .4617 NO2 concentration (M)

*asked on July 22, 2013* -
## physics

A 346 kg merry-go-round in the shape of a horizontal disk with a radius of 1.7 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. How large a torque would have to be exerted to bring the merry-go-round from rest to an

*asked on November 27, 2012* -
## physics

A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?

*asked on October 31, 2012* -
## calculus

Suppose that the sales at Borders bookstores went from 70 million dollars in 1989 to 415 million dollars in 1993. What is the continuous percent growth rate, per year, of sales?

*asked on January 17, 2011* -
## MATH GRADE 10****

Scott, Arif, and Diane run a small delivery company. For thier business, they use licensed two-way radios with a 20 km range. Scott is at their office which they have marked as the origin on their map of the town. Arif is dropping off a package at (-8, 16)

*asked on December 25, 2009* -
## Math

An ant walks 30 feet in 6minutes. How long will it take the ant to walk 35yards?

*asked on November 1, 2018* -
## physics

The planetMars requires 2.35 years to orbit the sun, which has a mass of 2 × 1030 kg, in an almost circular trajectory. Find the radius of the orbit of Mars as it circles the sun. The gravitational constant is 6.672 × 10−11 N · m2/kg2 . Answer in

*asked on November 8, 2012*