# sonia

Most popular questions and responses by sonia-
## Trig

From two different tracking stations, a weather balloon is spotted from two angles of elevation, 57degrees and 83 degrees, respectively. The tracking stations are 15 km apart. Find that altitude of the balloon. Any help given will be greatly appriciated

*asked on July 20, 2010* -
## Trig

a sailor out in a lake sees two likght houses 11km apart along the shore and gets bearings of 285degrees from his present position for light house A and 237degrees for light house B. From light house B, light house A has a bearing of 45degrees. How far to

*asked on July 21, 2010* -
## calculus

A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

*asked on November 21, 2012* -
## math

Paul has grades of 73 and 86 on his first two tests. What must he score on his third test in order to have an average of at least 70?

*asked on September 6, 2011* -
## physics urgent

A 1.5 m tall man stands 2 m in front of a flat wall mirror. Please find: image distance and height of image I have the formulas but i don't know how to solve this without the focal point or a radius...pls help!!!!!!!

*asked on December 10, 2011* -
## english iii

why did john choose the room in the yellow wallpaper?

*asked on March 10, 2013* -
## Clothing and Textiles

What are thedifferent methods of controlling fullness in a garment. Need pictures

*asked on March 28, 2011* -
## maths

THE Perimeter of a triangle is 2004. One Side of a triangle = 21 Times the other. the shortest side is integral length. SOLVE For lengths of the sides of the traingle in every possible case.

*asked on December 31, 2012* -
## Chem H

How do you write a balanced net ionic equation for the reaction Cr2(SO4)3(aq)+(NH4)2(CO3)(aq)?

*asked on December 12, 2010* -
## math

Find the volume of the solid formed by rotating the region enclosed by y=e^4x+3 y=0 x=0 x=0.7 this is my work V = ∫ e^4x dx {between x=0 and x=0.7} = 1/4 e^4x {between x=0 and x=0.7} = 1/4 (e^2.8 - e^0) = 1/4 (e^2.8 - 1) however i am etting the wrong

*asked on October 29, 2009* -
## math

walkie talkie phone company charges $18.00 for basic phone service per month and $0.15 per minute for long distance calls. Arena calls charges $80.00 per month with no fee for long distance calls. For what number of minutes of long distance calls is the

*asked on August 10, 2013* -
## maths

using a scale of 1:250 draw an accurate plan of a rectangular garden measuring 25m x 15m.

*asked on September 17, 2016* -
## Literature

What words and comparisons emphasize Achilles' speed? (question from the iliad)

*asked on August 27, 2007* -
## urgent physics

A power line carries a current of 110 A at a location where the Earth's magnetic field has a magnitude of 0.37 Gauss (0.37·10-4 T) and points due north, very nearly parallel to the ground. Find the direction and magnitude of the magnetic force exerted on

*asked on November 4, 2011* -
## physics

A point charge of -8.4 µC is at the origin. a)What is the electric potential due to this charge at (x,y) = (3.5 m, 0 m) b) What is the electric potential due to this charge at (x,y) = (-3.5 m, 0 m) c) What is the electric potential to this charge at (x,y)

*asked on September 16, 2011* -
## math

The temperature has been going down at a constant rate. In 8 hours it went down 16 degrees. Which expression best shows the temperature change each hour?

*asked on October 3, 2016* -
## Trignometry

A calculator is broken so that the only keys that still work are the \sin, \cos, \tan, \cot, \sin^{-1}, \cos^{-1}, and \tan^{-1} buttons. The display initially shows 0. In this problem, we will prove that given any positive rational number q, show that

*asked on May 4, 2014* -
## GEOMETRY 4.6

USE THE GIVEN SET OF POINTS TO PROVE EACH CONGRUENCE STATEMENT E(-3, 3), F(-1, 3), G(-2, 0), J(0, -1), K(2,-1), L(1, 2);

*asked on August 9, 2010* -
## Math

The temperature was less than 32 degrees Fahrenheit

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

A sail boat on lake Huron leaves Southampton and sails 20degrees west of north of 20km. At the same time, a fishing boat leaves Southampton and sails 30degrees west of south for 15 km. At this point, hot far apart are the boats, to the nearest metre? ( the

*asked on July 21, 2010* -
## Physics

I have been working on this homework question for a bit, but I just can't get it. Please help me! Where must an object be placed with respect to a convex lens (f=20cm) to generate an upright image that is 4 times as large as the object? 10 cm in front 10

*asked on April 25, 2011* -
## physics

Four light bulbs (A, B, C, D) are connected together in a circuit of unknown arrangement. When each bulb is removed one at a time (and subsequently replaced), the following behavior is observed while it is removed: A B C D A rem * on on on B rem on * on

*asked on September 30, 2011* -
## CHEMISTRY

NAME OF COMPOUND- CH3CHCL2

*asked on September 14, 2009* -
## physics

i need help figuring out what formaula to use for finding the final velocity of a rocket. Model rocket engines are sized by thrust, thrust duration, and total impulse, among other characteristics. A size C5 model rocket engine has an average thrust of 5.26

*asked on October 7, 2008* -
## chem

what mass of zinc will be required to react completely with 100cm3 of a 1.0M hcl.

*asked on January 17, 2016* -
## MDM4UO

A teacher provides pizza for his class if they earn an a average on any test the proability of the class getting an A average on one of his test is 8% What is the probability that the class will not earn a pizza for the firt seven tests? Answer is 0.5578

*asked on April 3, 2011* -
## PHYSICS

The fishing pole below (F = 94 N , = 1.90 m) makes an angle of 20.0° with the horizontal. What is the torque exerted by the fish about an axis perpendicular to the page and passing through the fisher's hand? i TRIED doing fdsinthetha=(1.90*94*sin20) this

*asked on November 10, 2008* -
## physics

A particle has an initial horizontal velocity of 2.9 m/s and an initial upward velocity of 4.5 m/s. It is then given a horizontal accelera- tion of 1.2 m/s2 and a downward acceleration of 1.2 m/s2. What is its speed after 4.9 s? Answer in units of m/s

*asked on October 25, 2012* -
## Please Please Help-Physics

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North

*asked on March 16, 2011* -
## econ

Consider the following data about the goods market in a hypothetical closed economy. Assume that government expenditure is constant at $200 million. Also assume that there is equilibrium in the goods market at all times. Some of the pairs of interest rate

*asked on March 14, 2010* -
## econ

Consider the following data about the goods market in a hypothetical closed economy. Assume that government expenditure is constant at $200 million. Also assume that there is equilibrium in the goods market at all times. Some of the pairs of interest rate

*asked on March 14, 2010* -
## Physics

If a body of weight 10N is lifted from the floor to a table 2m above the floor, calculate the potential energy gained by the body

*asked on April 11, 2019* -
## physics

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.16 m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.58 s before

*asked on October 13, 2012* -
## Statistics

Three cards are drawn with replacement from a standard deck. What is the probability that the first card will be a spade, the second card will be a black card, and the third card will be a queen? Write your answer as a fraction or a decimal number rounded

*asked on June 22, 2012* -
## geometry

Given two spheres, if the volume of the first sphere is 36r, and the volume of the second sphere is 288r, what is the relation of the second radius to the first radius?

*asked on August 1, 2011* -
## Math

Charlene takes the bus to work in the morning then walks home for lunch walks back to work and finally walks home in the evening the distance one way is 600 meters how far does she walk each day between home and work

*asked on January 11, 2018* -
## PoE

Turner’s treadmill starts with a velocity of −1.9 m/s and speeds up at regular intervals during a half-hour workout.After 36 min, the treadmill has a velocity of −7.6 m/s. What is the average acceleration of the treadmill during this period? Answer

*asked on October 7, 2012* -
## econ

Suppose you inherit $10,000 and decide to use the money to start a lawn-care business. You purchase a truck and a mower for $10,000 and start mowing lawns. Your annual cost for fuel and other supplies is $2,000. Now, instead of investing your money in the

*asked on April 9, 2010* -
## Govt. accounting

The following information relates to Dell City, whose first fiscal year ended December 31, 2006. Assume Dell has only the long-term debt specified in the information and only the funds necessitated by the information. 1. General fund: • The following

*asked on March 22, 2008* -
## statistic

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal.

*asked on August 24, 2011* -
## Organic chem

When you react 1-octene wih borane tetrahydrofuran solution and hydrogen peroxided over NaOH and water... (hydroboration- oxidation reaction) how do you run the reaction differently to improve the yield of the major product 1-octanol?

*asked on November 4, 2009* -
## physics

A man jogs at a speed of 1.7 m/s. His dog waits 1.4 s and then takes off running at a speed of 3.4 m/s to catch the man. How far will they have each traveled when the dog catches up with the man? Answer in units of m

*asked on September 30, 2012* -
## statistic

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b. Relative frequency of

*asked on August 24, 2011* -
## physics

a piece of iron has a temperature of 18 degrees celsius. A second identical piece of iron is twice as hot. What is the temperature of the second piece of iron? Please explain why.

*asked on December 13, 2010* -
## geometry

ABCD is a square with area =625 in square. The circumfrence centered in circle is circunscribed by ABCD. Find the approximately value of the shaded area. Use pie = 3.14

*asked on May 20, 2010* -
## math

if you do a job in 4 hours, and your friend can do the same job but in 6 hours, and if you both work together how long will it take to complete the job?

*asked on September 6, 2008* -
## math

After Khalil gave Benjamin 3/5 of the rocks in his collection, Benjamin had 70 rocks. If Benjamin had 25 rocks in the beginning, how many rocks did Khalil have in the beginning?

*asked on January 28, 2015* -
## math

there are 36 carpenters in a crew. on a certain day, 29 were present. what percent showed up for work?

*asked on August 10, 2013* -
## calculus

A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

*asked on November 21, 2012* -
## Algebra 1

Can someone tell me the x- and y- intercepts of: x+y=9 Explain how you got the answer please.

*asked on February 8, 2012* -
## physics urgent!

The magnetic field in the region shown below is increasing by 5 T/s. The circuit shown (with R=25 , C=55 µF, dimensions 1 m by 2 m) is inserted into the region as shown. The capacitor is initially uncharged. 1. What is the current in the circuit at the

*asked on November 12, 2011* -
## physics

A transformer with 360 turns in its primary coil and 18 turns in its secondary coil is designed to delivered an average power of 1400 W with a maximum voltage of 60 V. What is the maximum current in the primary coil?

*asked on August 3, 2011* -
## help please

if you are printing an essay on the comuter....can the essay be double line space?

*asked on April 15, 2011* -
## math

a dailly farmer produce 50 tons of rice in the first day, 57 tons in the second day, and 64 tons in the third day. the production continue to increase in the same manner up to the 28 day. what is the a) production of the farmer on the 28 day? b) what is

*asked on November 2, 2010* -
## algebra

solve by substitution, 9x+2y=-64

*asked on October 29, 2009* -
## econ

1) during last year a company went through $800,000 worth of net loss. yet its cash increased 300,000 during the same period of time. How could this occur. Please help confused!

*asked on October 21, 2009* -
## calc

The equation of the tangent line to y=f(x) at a=2 can be written in the form y=mx+b where f(x) =4sinx/4sinx+6cosx i already got 3/2 for m but i cant seem to find out how to get the value of b?

*asked on May 9, 2008* -
## math

What is divisor. Dividend quotient

*asked on April 10, 2008* -
## math

The ratio of Jane's number of soda to Pat's number of soda is 2 to 3. If Jane has 16 cans of soda, how many cans of soda does Pat have?

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

A bomber flies horizontally with a speed of 225 m/s relative to the ground. The altitude of the bomber is 3010 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically

*asked on October 25, 2012* -
## Science- Chemistry

A test tube containing a mixture of compounds X, Y, and a small amount of Z weighs 25.4886 g. The tube is emptied into a beaker and the empty tube is reweighed, giving a value of 10.2586 g. The mixture is separated into two components by dissolving in

*asked on October 13, 2012* -
## math

identify the property that it shown. 2*8*5=2*5*8

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

tickets to a school play cost 1.5 in advance and 2.0 at gate. by selling all 200 tickets students got $360. how many tickets did they sell in advance?

*asked on January 29, 2012* -
## math

write the place name for the 4 in the following number 3 624 786

*asked on May 3, 2011* -
## Phys 2

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North

*asked on March 16, 2011* -
## English

in a paragraph......details grow out of the major details and also give information about..... details. what are the best suitable words for these two blanks?

*asked on November 5, 2010* -
## math

a man saved a sum of 200 dinars in the first month, 250 in the second month, 300 in the third month and he continue to save at the streght. after how many month can he buy a radio instronment coastin 13500 dinars

*asked on November 2, 2010* -
## econ

If i were to do a simple supply and demand curve for subprime mortagages I know I would do the supply as increasing but what happens to the demand would I say the demand for these mortagages also increased causing the price to say the same I feel as though

*asked on August 5, 2009* -
## math

Consider the function f(x)=10sqrrootx+5 on the interval [3,10]. i found the average slope to be 2.043181217 By the Mean Value Theorem, we know there exists a c in the open interval (3,10) such that f'(c) is equal to this mean slope i tried tking the first

*asked on May 6, 2009* -
## music

I am still on to the four seasons oh by the way thanks to miss sue your a star!But I have a lot of infomation on vivaldi not the 4 seasons,and thanks for taking the time to help!

*asked on April 2, 2008* -
## algebra

i have a problem in dis sum from complex numbers prove that (1+sinA+icosA)/(1-sinA-icosA)=i(secA+tanA)

*asked on April 1, 2008* -
## Geography

What government imposed barriers stop or hinder the export of automobiles?

*asked on February 26, 2007* -
## chemistry

calculate the weight in grams far a given solution of sodium thiosulphate crystals of strength 2.0M

*asked on January 21, 2016* -
## chemistry

What mass of NaHCO3 must be added to 100ml H2O to produce a solution with a pH of 10? K1(H2CO3)=4,6*10^-7 K2(H2CO3)=4,4*10^-11 -------- Help! Thank you

*asked on January 7, 2016* -
## math

the elevation of a tower from a point on the ground is 30 at a point on the horizontal line passing through the foot of the tower and 100 metres nearer it, the angle of elevation is 60 find height of the tower and the distance of the first point from the

*asked on September 6, 2015* -
## maths

Fuel wood logs sawed 53 times and 72 pieces made. If the cutter saw only one at a time how many there were before cutting?

*asked on May 21, 2015* -
## math

Estimate 5/30 as a percentage.

*asked on February 5, 2015* -
## math

Alex's car takes 10 gallons of gas for 20.10 miles. If Shon's car uses 3/10 the amount of gas as Alex's car to travelled, what is the mileage for each person's car? How man gallons of gas would each need to travel 4.5 miles?

*asked on December 10, 2014* -
## Quantum Physics

What is the probability current density of a particle with wavefunction ψ(x,t)=exp(iℏ(px−Et))?

*asked on October 21, 2013* -
## To Reiny, math helper

can you look at my post, its just 4 math terms I need to figure out, please help

*asked on September 18, 2013* -
## Math definitions

a number that can be expressed as the product of 3 equal factors? a number that can be expressed as the product of 2 equal factors product of 1 and a radical product of a rational number and a radical

*asked on September 18, 2013* -
## math

find the radius and height of a cylindrical soda can with a volume of 21in^3 that minimize the surface area.

*asked on April 28, 2013* -
## math

verify that the function satisfies the hypotheses of the mean values theorem on the given interval. then find all numbers c in the given interval that satisfy the conclusion of the mean value theorem. f(x)=2x/x4 [0,3]

*asked on April 28, 2013* -
## physics

A car starts from rest and travels for 5.9 s with a uniform acceleration of +3.0 m/s2. The driver then applies the brakes, causing a uniform deceleration of 1.3 m/s2. If the brakes are applied for 2.1 s, how fast is the car going at the end of the braking

*asked on October 7, 2012* -
## health safety and nutrition of young child

could u please give answers for exam 40553400. i,m not sure about my answers

*asked on October 19, 2011* -
## child care

in preparing budget for a day care center, you must plan for taxes.as an amployer you must pay part of employees which tax

*asked on October 18, 2011* -
## Statistic

Indicate whether the given statement could apply to the data set consisting of 1000 values that are all different. 1. The 29% is greater then the 30 th percentile. 2. The median is greater then the first quartile. 3. The third quartile is greater then the

*asked on August 20, 2011* -
## Pre-algebra

0.2297=(1/x^2-1/49) I don't get how to solve for x. Pls help stuck on a problem

*asked on June 19, 2011* -
## math

the first term of an arthmetic progression is 1 and its last term is 28, find the sum of the progression if their number is 10

*asked on November 1, 2010* -
## positive psychology

Week 2: Online Presentation: “Tutorials & Guides-1” - Due Date: Day 3 [post to the Main forum] This week you will chose a topic from the Online Presentation Guidelines and follow the directions there. Use the PowerPoint presentation as a guide. Be sure

*asked on October 5, 2010* -
## cacl

integral of x^3+65/X^+7x+12 dx when i solved i got x^2/2-7x+64ln(x+4)-111ln(x+3)+c however this isn't the right answer....what have i done wrong??

*asked on December 2, 2009* -
## microecon

Our professor gave us a exercise to do for fun where he said to derive profit=PQ(P,A)-C(Q(A))-A (note Q is a function of A both for revenue and cost) the answer I came up with is profit= Pdq/da -Cqfq/da-1 =Pdq/da -(d+c/dq)(dq/da) Im not sure if I am right

*asked on November 30, 2009* -
## econ

My professor asked to take the derivative of profit for fun so I just wanted to check if my answer was right. profit=PQ(p,a)-c(q(a))-a dΠ/dQ = -2bQ + (a-c) ≡ 0. Thus, -2bQ = -(a-c) and Q = (a-c)/2b.

*asked on November 23, 2009* -
## cacl

cos(t)/(5sin(t)+8)^2 the answer i got was: xcos(t)/(5sin(t)+8)^2 this is not right when i put it in what did i do wrong?

*asked on November 19, 2009* -
## math

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=1/x^2 y=0 x=4 x=7; about y=–3 i integrated and plugged in values for x and got .61 *pi this is not the right answer been trying for hours

*asked on October 23, 2009* -
## algebra

In 1990, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 70.0 years. Let E represent the life expectancy in years t and let t represent the number of years since 1990. E(t)= ___t +____ round to the nearest tenth. Use the

*asked on October 22, 2009* -
## college algebra

y=-10x+5 m= what. I came up with 5 am I close

*asked on October 8, 2009* -
## Math

How do I multiply fractions with different denominators? Do I always do cross multiplication? EX: Xy, when X = -5/16 and y = 7/15. 2. How do I write 12/5 as a whole number?

*asked on September 27, 2009* -
## indefinite integrals

integral from 1 to 0 dx/x^1/2 i am unsure on how to even start would the limit still go to infintiy?

*asked on August 27, 2009* -
## math

y=x^2e^x I am suppose to find the dy/dx of this the way i did it was x^2e^x times dy/dx of x^2 and got x^2e^x times 3x^2 this is not right and im confused on how to solve it help pls.

*asked on August 12, 2009*

## Pages

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