Monday
December 5, 2016

Posts by anonymous

Total # Posts: 103,058

math
A ship leaves port at 7 am and heads due east at 34 knots. At 10 am, to avoid a storm the ship changes course to N 57° east of north). Find the ships distance from port at 2 pm. Round to the nearest tenth. To determine nautical miles multiply the speed in knots by the ...
November 6, 2016

math
When an airplane leaves the runway, its angle of ascent is 13° with a speed of 82 metres per second. Find the altitude of the plane after 7 minutes.
November 6, 2016

math
A pilot is asked to approach the airport at an 6° angle of descent. If the plane is travelling at an altitude of 27000 ft, at what horizontal distance from the airport should the descent begin? Give your answer to the nearest foot. Your Answer:
November 6, 2016

trig
A communication tower is 34m tall. Jane stands somewhere in front of the tower to the right and measures the angle of elevation to be 70 degrees. Bill stands somewhere in front of the tower to the left and measures the angle of elevation to be 50 degrees. How far apart are ...
November 6, 2016

math
Ali swims 4m for every 1m Anton swims. By how far in meters will Ali beat Anton if the race is 50m?
November 6, 2016

chemistry
The atomic mass of an element is 27.and its equivalent mass is 9.the vapour density of chloride is
November 6, 2016

maths
how to solve this equations 2x=3x
November 5, 2016

Algebra 2
Thanks Steve
November 5, 2016

Algebra 2
Yes
November 5, 2016

Algebra 2
Given: log(10,5)=a, log(10,3)=b, log(10,2)=c Find: log(30,8)
November 5, 2016

geography
A football match is to be played on Saturday in NewZealand(longitude 150 degrees east) between the host country and Nigeria (longitude 15 degrees east).If the match is to be televised life, at what time should Nigerians tune in their television sets to watch the kickoff ...
November 5, 2016

geography
If the time at Town A longitude 75 degrees west is 5 p.m. on Friday what will be the time at Town B longitude 120 degrees east
November 5, 2016

geography
Sorry.It's 120 degrees east
November 5, 2016

geography
If the time at town A (longitude 75 degrees west) is 5.00pm on Friday,what will be the time and day at town B?
November 5, 2016

chem.
A mixture of gases contains twice as many moles of As as Kr. If 0.300 mol of Xe is added to this mixture, the pressure increases from 1.26 atm to 1.47 atm. how many moles of Ar are in the mixture?
November 5, 2016

physics (urgent)
average rpm during halt = 50 rev/min time to halt = 10 rev/50 rev/min = .2 min or 12 seconds omega at start = 100 rev/min*2pi rad/rev * 1 min/60s = 100 *2pi/60 radians/second so alpha = d omega/dt = - 10pi/3 / 12 radians/s^2 and Torque = I * alpha
November 5, 2016

PHYSICS
average speed = 30 time to stop = t = d/30 -mu m g = m a a = -10 mu = - 5 m/s^2 v = 60 + a T 0 = 60 -5 t t = 12 seconds to stop then d = 60 (12) - (1/2)(5)(144) d = 5 (144) - 2.5(144) d = 2.5 * 144
November 5, 2016

Physics
(a) Av = v^2/r = 9/2 (b) (1/2) m v^2 (c) distance = 2 pi r time = distance / v (d) omega = v/r Hey, this is all in your text easy.
November 5, 2016

Physics - Gravitation
find potential and kinetic energy of each orbit and subtract.
November 5, 2016

Physics Gravitation Question
I did part A) below B) g = v^2/R 2 pi R = v T so v = 2 pi R/T
November 5, 2016

Physics Gravitation Question
g = G M/R^2 here R = 525,000 meters M = 2.59*10^20 G = 6.67 * 10^-11 for part 2 calculus helps dg/dr = -2R G M /R^4 so dg = -2 G M/R^3 dr dg/g = -2 G M/R^3 (R^2/GM) dr dg/g = -2 dR/R here dR/R = 22/525
November 5, 2016

sir-reiny-steve help
In a survey carried out among 100 soldiers, the investigation shows that 42 were shot on head, 43 on arm, 32 on leg, 5 were shot on head and arm, 8 on arm and leg and 6 on leg and head. How many soldiers were shot; (i). all three parts of the body. Plz help
November 5, 2016

Physics
Initial x momentum = 2.5 u Initial y momentum = 0 Final x momentum = 2.5 V cos 22 + 4.9 (15) cos 37 Final y momentum = 2.5 V sin 22 - 4.9(15)sin 37 SO use final y momentum = 0 to get velocity of particle 2 4.9(15) sin 37 = 2.5 V sin 22 then go back and use the x momentum to ...
November 5, 2016

Physics
No one said energy was conserved!!!! Momentum is conserved in the x direction AND Momentum is conserved in the y direction
November 5, 2016

Math
All my pairs of underpants are red except two. All my pairs of underpants are blue except two. All my pairs of underpants are pink except two. How many pairs of underpants do I have?
November 5, 2016

Adv function
Cos^4(x)+sin^4(4)=cos(2x) Plz help.
November 5, 2016

math
Two trains leave the station at the same time, one heading west and the other east. The westbound train travels 10 miles per hour slower than the eastbound train. If the two trains are 720 miles apart after 4 hours, what is the rate of the westbound train?
November 5, 2016

Adv function
(2-sin^2x)/-sinx=sinx Is this doable. That's the answer but I can't get the l.s to equal r.s
November 4, 2016

Calculus Reimann Sum
Approximate ?_-2^3(x+3)dx via the Riemann sum. Use the partition of five subintervals (of equal length), with the sample point barx_i being the right end point of the i-th interval. I attempted this problem and got -40/3, but it's not being accepted. I'm not sure what ...
November 4, 2016

spanish
Question 2 is C then right?
November 4, 2016

Help please spanish
please correct me if I am wrong
November 4, 2016

spanish
am i right?!
November 4, 2016

spanish
my answers: C A B
November 4, 2016

spanish
How do people in the Spanish speaking world invite people to their parties? A) Formal, written invitations B) Posting the celebration in the newspaper well in advance C) Verbally without much notice Which of the following is not true about Barcelona? A) It is the capital of ...
November 4, 2016

Chemistry
N2(g) + 3H2(g) -> 2NH3(g) How many grams of ammonia are formed from 14.0 grams of nitrogen? 14/2 = 7 grams of ammonia
November 4, 2016

social studies
Is it B?
November 4, 2016

ss
Since Greenwich, England is on the prime meridian, which of the following is a line of longitude that would be found in North America? a. 45° N c. 30° S b. 70° E d. 100° W
November 4, 2016

Science
idk
November 4, 2016

Math
Davis High School Multi-Step The heights of the starting players for the and 69 in. Find the team are 78 in., 74 in., 71 in., 7o in., Boys basketball average height of the starting players.
November 4, 2016

help help help sir steve
find 16^1/3 without the use of calculator plzzzz help i dont know it
November 4, 2016

Algebra 2
Consider the graph of f(x)=2[[x/3]] +4 with doman {x|0<_x<12}. Create the piecewise function that would produce the same graph over the indicated domain. [[ ]] stands for a step function
November 4, 2016

physics
A small disk of radius r is glued onto a large disk of radius R that is mounted on a fixed axle through its center. the combined moment of inertia of the disks is I. A string is wrapped around the edge of the small disk and a box of mass m is tied to the end of the string. the...
November 3, 2016

Adv function
sin(7x)= sin(x)[cos^2(3x)-sin^2(3x)]+2cos(x)cos(3x)sin(3x) I tried for an hour but still don't know how. Plzz help
November 3, 2016

Ad. Functions
write 2sin(2x)+(rt12)cos(2x) in the form of y= Acos(2x-theta) by finding A>0 and theta is a real number between [0, 2pi] I found that a=2 and theta =pi/2. But I don't think that's right
November 3, 2016

Health
Why is it important to eat a variety of foods?
November 3, 2016

Math
( 7.5x10^11 ) - ( 4.3x10^8 )
November 3, 2016

Math
5d=(445-120) d=1/5(445-120)
November 3, 2016

Physics
A mass is tied to a 1 m string. The string is attached to a point on a horizontal frictionless surface and the mass is set into circular motion. The string will break if tension becomes larger than 10 N. The maximum kinetic energy that the mass can achieve before the string ...
November 3, 2016

Math
|-3| , -3 what is the difference between the two
November 3, 2016

maths help
A binomial expansion is such that (p + x)^n = 3q + 6qx + 5qx² + .. If p ? 0, find the values of p, q and n plz show step
November 3, 2016

Math
Mrs. Miller is planning a vacation overseas. She knows that fuel is sold in liters in other countries. She wants to become familiar with this measure of volume. Mrs. Miller just purchased 14 gallons of fuel for her car. About how many liters is this?
November 3, 2016

Calculus
If f(x) = 2xsqrt(x-6), what is the value of (f^-1)(40)?
November 2, 2016

math
bjbjhh
November 2, 2016

chem
Consider the isotope arsenic-76 How many protons are in an atom of this isotope? 33 What is the mass number of this isotope? 76 How many neutrons are in an atom of this isotope? 43 What is the atomic number of this isotope? 33 Give the nuclear symol 76/33 As How many electrons...
November 2, 2016

Algebra 2
-b +/- square root of b^2 -4ac all divided by 2a 4 +- sq rt(16-4(1)(-1)) divided by 2 4 +- sq rt (16 +4) divided by 2 4+- sq rt(20) divided by 2 4+/- 2 sqrt 5 divided by 2 2+sqrt 5 or 2-sqrt 5 = x
November 2, 2016

Math
19 2/3 + x + x = 113 1/3 2x = 93 2/3 x = 46 5/6
November 2, 2016

Adv function
Express sec2x in terms of tanx and secx I know you have to sec(2x) = 1/cos(2x) = 1/(cos²x - sin²x) But how do you split that. Like how to simplify that?
November 2, 2016

algbra
You have a full time job at a clothing store that pays a base rate of $13 per hour, with time-and-a-half for hours over forty in a week. You also earn a 2% commission on your total sales for the pay period. You are paid biweekly. You have determined that the withholding amount...
November 2, 2016

Math HELP!!
good job
November 2, 2016

Math
Your mom ooooooooooooohhhhhhhhhhhhh
November 2, 2016

Math
4/5 x 100 = 80 shaded
November 2, 2016

statistics
Despite he outrageous incomes of some, the mean income of all aging rock stars is relatively modest: $75,000 with a standard deviation of $2,000. On that scale, Chubby Checker, appears to do better than average: at most, only 6.25% of aging rockers make more than he does. what...
November 2, 2016

algebra 2
f(x) = -4x + 7 and g(x) = 2x - 6.
November 2, 2016

Calculus
Find the particular solution that satisfies the differential equation and the initial conditions. F'(x) = 4x^2 f (-1)=3 F'(t)=10t-12t^3 f (3)=2
November 2, 2016

physics
Two buses leave a bus station and travel in opposite direction from the same standing point.if the speed of one is twice the other and they are 240km apart at the end of one hour. What is the speed of each km
November 2, 2016

Chemistry
How much heat is required to convert solid ice with a mass of 810 g and at a temperature of -18.0 °C to liquid water at a temperature of 62.5 °C? (The specific heat of ice is cice = 2100 J/kgK, the specific heat of water is cwater = 4186.8 J/kgK, and the heat of fusion...
November 2, 2016

maths steve reiny
Sqrt(x)^sqrt(x)=2 show solution step that all i need thanks
November 2, 2016

Math, Precalc
3^x + 5^(x+3) - 3^(x+4) + (1/3)5^(x+2)= 0 3^x(1 - 3^4) + 5^(x+2)(5 + (1/3)(1) ) = 0 -80(3^x) + (16/3)(5^(x+2) = 0 times -3/16 15(3^x) - 5^(x+2) = 0 15(3^x) = 5^(x+2) divide by 5 3(3^x) = 5^(x+1) 3^(x+1) = 5^(x+1) this can only be true if x = -1 that is, if 3^0 = 5^0 , which is...
November 2, 2016

Math, Precalc
Sue's time riding the bike = 5/15 hrs = 1/3 hr Sue's time walking the 2 miles = 2/3 hr total time = 2/3 + 1/3 = 1 hr total distance = 7 miles average speed = 7/1 = 7 mph
November 2, 2016

Gaussian Elimination Method
Write the system of equations as an augmented matrix ?????u=150?7s+4m=25019s?11m=300
November 2, 2016

SS Check Answers
did you mean 1967 or 1965?
November 2, 2016

Texas History
Answer please!!!!!!!!!!!!!!
November 2, 2016

Texas History
What is the answer?
November 2, 2016

Texas History
I am reading my book about this stuff but it is hard to find the answer for this. I need at least 4 sentences about this.
November 2, 2016

Texas History
Explain how the fall of the Alamo and the Goliad Massacre both hurt and helped the Texans' quest for independence in the Texas revolution. (4 pts)
November 2, 2016

counseling
stanford-binet
November 2, 2016

Maths
A metere long strip is cut into 12 equal pieces. What is the length of each pieces
November 2, 2016

art history
in the painting the wedding, each person is a
November 2, 2016

art history
in the painting the wedding, each person is a
November 2, 2016

maths
The cost of fencing a square field at 40paise per meter is rs.2000.Find the cost of watering the field at 80 paise per 100square
November 2, 2016

maths
The cost of fencing a square field at 40paise per meter is rs.2000.Find the cost of watering the field at 80 paise per 100square
November 2, 2016

math
(2x+1)^3
November 2, 2016

Ad.func
I just rlly don't have a clue how I should proceed with this question. A picture is hanging 3 meters high and is hanging so the bottom of the picture is 1 meter above you eye level. How far from the wall on which the picture is hanging should you stand so that the angle of...
November 1, 2016

american goverment
5.  Which of the following policies represents current American foreign policy? (1 point) isolationism nation building containment international cooperation 5.D
November 1, 2016

9th grade algebra (factoring with quadratic)
Okay. thanks! It was confusing to me. I'll double check them for typos and look up quadratic formula.
November 1, 2016

american goverment check answers
6.  In January 2013, the United States officially recognized the government of Somalia for the first time since 1991. Which of the following is one ...
November 1, 2016

Chemistry
Consider the reaction between 56.0 mL of liquid ethanol (C2H5OH; density = 0.789 g/mL) and 26.0 L of O2 at 27.0°C and a pressure of 1.95 atm. The products of the reaction are CO2(g) and H2O(g). Calculate the number of moles of H2O formed if the reaction goes to completion.
November 1, 2016

math
a. Express P (x)= 1/6 ; for x = 1, 2, 3, 4, 5, 6, in distribution form. b. Construct a histogram of the probability distribution P(x) =1 over 6 ; for x = 1, 2, 3, 4, 5, 6. c. Describe the shape of the histogram in part (b). (Please show all work) Thank You
November 1, 2016

Pythagorean theorem
How do I check my answer when my triangle is an Acute Triangle?
November 1, 2016

Health
they are all right i belive sorry if im wrong im only in 6th grade but i think there right :)
November 1, 2016

Phys ED
Apply your previously acquired knowledge of soccer and decide which position in basketball resembles the sweeper in soccer? A: Point guard B: Shooting guard C: Power Forward*** D: Small Forward
November 1, 2016

statistics
a social worker is involved in a study about family structure. She obtains information regarding the number of children per family for a certain community from the census data. Identify the random variable of interest, determine whether it is discrete or continuous, and list ...
November 1, 2016

UTECH
Your company has raised financing by issuing 25-year bonds on January 1, 2009. They mature on December 31, 2033 and have a par value of $1,000 and a coupon rate of 8%. Coupon payments are made semi-annually.
November 1, 2016

math
suppose that your bank pays 10% interest, compounded semiannually. Use table 12-2 of your text to find how much should be deposited now to yield an annuity payment of $400 at the end of every six months, for 4 years.
November 1, 2016

Physics
bnnhnn
November 1, 2016

Math
1.If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 38 rounded to the nearest ten is 40. 1.If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30
November 1, 2016

history
where and when were the workers used on large farms in your question?
November 1, 2016

Chem
which particle is larger in radius silver ion or neutral silver atom
November 1, 2016

Math
The length of a rectangle is 3 units shorter than one-third of the width, x. Which expression represents the perimeter of the rectangle?
November 1, 2016

Social Studies 7 Pls CoRRect Mee
b,d b a c
November 1, 2016

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