Sunday
September 21, 2014

Posts by Mike


Total # Posts: 3,162

biology
Which of the following would NOT likely have occurred without the evolution of photosynthetic organisms? A. Life would be much less diverse. B. Most organisms would have gone extinct due to the increase in oxygen. C. Mitochondria-containing cells would not have evolved. D. ...
September 16, 2014

Statistics
A class consists of 9 students with an average age of 40. When the Instructor arrives the average age of the students and the Instructor is 41. What is the age of the Instructor?
September 15, 2014

Physics
A kayaker needs to paddle north across a 85 m wide harbor. The tide is going out, creating a tidal current that flows to the east at 1.6 m/s. The kayaker can paddle with a speed of 2.8 m/s. (a) In which direction should he paddle in order to travel straight across the harbor?
September 11, 2014

Physics
A cannon fires a shell straight upward; 2.1 s after it is launched, the shell is moving upward with a speed of 20 m/s. Assuming air resistance is negligible, find the speed (magnitude of velocity) of the shell at launch and 4.7 s after the launch.
September 5, 2014

ratios
Billy wanted to write a ratio of the number of cars to the number of trucks in the police parking lot. He wrote 1:3. Did billy write the ratio correctly?
September 2, 2014

math
12. What is the distance between P(–4, 3) and Q(6, 1)? Round to the nearest tenth. can someone please explain how to do this problem please
August 29, 2014

math
Diana is going camping with her family. Their campsite is 3/4 mile away. They walk at a steady speed of 1 and 1/8 miles an hour. How many minutes will it take to get to the campsite
August 21, 2014

math
A micro-millimeter is defined as one millionth of a millimeter. A length of 17 micro-millimeters may be represented as A. .00017 mm. B. .0000017 mm. C. .000017 mm. D. .00000017 mm.
August 13, 2014

criminal justice
How a warden must address ethical issues between the correctional officers and the inmates. Can you help me with where to locate information for this question
August 9, 2014

Economics
. A firm has prospective sales of $50 million, fixed costs of $60 million, and variable costs of $40 million. What does the firm do (a) in the short run? (b) in the long run?
August 6, 2014

MA 1310
What is the amplitude, period and phase shift for y = 1/4 cos (3x +7)? Thank you, please show work.
August 4, 2014

physics
(a) How high a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 78.0 km/h? m (b) If, in actuality, a 750 kg car with an initial speed of 78.0 km/h is observed to coast up a hill to a height 12.0 m above its starting point, how much...
August 4, 2014

chem
Ksp: BaSO4: 1.1*10^-10 CaSO4: can't find it
August 3, 2014

chem
It doesn't give anything else except what i wrote
August 3, 2014

chem
sample of 1.00g of BaSO4 and a similar sample of 1.00g of CaSO4 were added to water at 25 Celsius to give 1L of solution. Calc. the concentration of Ba2+, Ca2+, and SO4^2- ions present in the solution?
August 3, 2014

Math
A particle moves with a velocity of v(t)=3cos(2t) m/s along an axis. Find the distance traveled by the particle over the time interval 0 is less than or equal to "t", which is less than or equal to (pi/8)
July 31, 2014

Math
find the area of the region bounded by the function y=-x^2+5x-4 and the x-axis
July 31, 2014

math
a 20ft flag pole casts a shadow 30ft long. the pole is 25ft from the wall. how high is the wall in the nearest tenth?
July 21, 2014

chemistry
a. Determine the density of a cube of copper with a length of 5.00 cm and a mass of 1,112.50 g. b. Calculate the number of atoms in the cube
July 20, 2014

Chemistry
Thank you so much for all your help.
July 15, 2014

Chemistry
Q=578000(1.2)(7.8)= 5410080. Im not sure I understand the last part with the grams of the salt.
July 15, 2014

Chemistry
Glauber's salt undergoes a phase transition according to the following equation: Na2SO4*10H2O(s)--> Na2SO4*10H2O(l) ∆H = 74.4 kJ/mol Calculate the mass (g) of Glauber's salt (use the masses to two decimal places found in the front of your text) needed to lower...
July 15, 2014

Chemistry
A 38.9 g piece of iron at 84.6oC is placed in a beaker containing 179.7 g of 20.7oC water. What is the final temperature (oC)of the water?
July 14, 2014

Chemistry
An unknown metal with a mass of 313 g has a heat capacity of 121 J/oC. What is the specific heat of the metal?
July 14, 2014

Chemistry
THANK YOU!!!
July 13, 2014

Chemistry
Yes, thank you for catching that. So with the corrections (except I kept R as .0821) I got (1)(.0821)(300.8)/1.1=22.45. Then 16.042/22.45=0.71g/L Is it now correct? I appreciate all your help!!!
July 13, 2014

Chemistry
V=nRT/P I used (1)(.0821)(300.8)/1=24.7
July 13, 2014

Chemistry
So I have gotten 2 different answers. I used V=nRT/P to get the volume. Which was 24.7. Then I used D=M/V and divided 16.042/24.7 to get .65g/L Is that right?
July 13, 2014

Chemistry
Determine the density of methane (CH4) in g/L at 27.8oC and 1.1 atm.
July 13, 2014

Chemistry
A volume of 0.155 L of a gas at STP weighs 0.412 g. Calculate the molar mass of the gas.
July 13, 2014

Non
How many US gallons of fuel will a tank 66 in three-quarter inch by 132" x 10" whole
June 30, 2014

finance
Innovation Company is thinking about marketing a new software product. Upfront cost to market and develop the product are $5 million. The product is expected to generate profits of $1 million per year for 10 years. The company will have to provide product support expected to ...
June 13, 2014

Physics
The air pressure on Pikes Peak in Colorado is approximately 600 millibars. What is the relationship between air pressure at the top of Pikes Peak and at sea level, where air pressure is 1013 millibars?
June 10, 2014

Science
The air pressure on Pikes Peak in Colorado is approximately 600 millibars. What is the relationship between air pressure at the top of Pikes Peak and at sea level, where air pressure is 1013 millibars?
June 10, 2014

math
Could you explain to me why 9/64 is the answer to the following questions:A fair spinner is spun three times. The spinner is labeled A,B,C,D. What is the probability of getting a c exactly twice?
June 6, 2014

physics
What is the free-fall acceleration in a location where the period of a 2.87 m long pendulum is 3.4 s? Answer in units of m/s 2
June 2, 2014

history
cn I get paper 1 and paper 2 memorandam of 2014
May 29, 2014

Albebra
A flush in a five card hand with all cards of the same suit.What is the probability of getting a flush?
May 28, 2014

math
if i an 100' from a tree and the angle to the top is 24 degrees how tall is the tree
May 26, 2014

Spanish / Language
Carlos lives in Segovia in an apartment on the bottom floor of a beautiful old building. What do you call this floor in Spanish? Be sure and use the article, "el" or "la" with it. (1 point) Fill-in-the-Blank 2. Roberto lives two floors above Carlos. What ...
May 24, 2014

Math
A beam tests against a wall, forming a 50 degrees with the floor. Use the function y=9 sec 0 to find the length of the beam to the nearest tenth of a foot. 14.0 ft 11.7 ft 5.8 ft 6.9 B?
May 19, 2014

Algebra 2
A B C or D?
May 19, 2014

Algebra 2
-1 -3 -3 1-7 6 -1 -3 3 1 -7 6 1 -3 3 -1 -7-6 -1-3 3 1 7 6
May 19, 2014

Algebra
Which is the degree measure of an angle whose tangent is 5.67? Round the answer to the nearest whole number.
May 19, 2014

PHI 103
This is not the best of all possible worlds, because the best of all possible worlds would not contain suffering, and this world contains much suffering
May 11, 2014

Algebra
1/2(10x-8)-3(x-1)>15=?
May 8, 2014

world regional geography
Expanding the copra trade
May 8, 2014

math
Let say that Amy made 8 out of 21 free throws and Jane made 4 out of 21 free throws. Who had the better rate of success? Round your answer to the nearest percent.
May 4, 2014

math
Simply the unknowns variables 5(2-c)=10(2c-4)-6(3c+1) 1.25y-20.5=0.5y-11.5 (3) 7p-3q=23(3)
May 3, 2014

computer
You suspect that the failure of a router or of a transmission line connecting routers has left some of your important servers unavailable to clients at your site. How could you narrow down the location of the problem using what you learned in this chapter?
April 30, 2014

Computer
A router receives an IPv4 packet. The source ip address is 10.55.72.234. the destination host is 10.4.6.7. the TTL value is 1. The protocol field value 6. What will the router do with this packet?
April 30, 2014

physics
A box is being lowered down a wall at constant speed by a girl, as shown. Her hand is pushing on the edge of the box with 50 N of force at a 45° angle above the horizontal. The box weighs 40 N.
April 24, 2014

Science -Check Answers- Please
1.) How did planetesmals form planets? A. They broke apart into smaller chunks. B. They collided and stuck together. ******** C. They cooled and pulled ice together. D. They began to rotate. 3. Which of the following statements about features on the sun is true? A. Prominences...
April 14, 2014

History
I'm trying to find out the difference between Masons and Anti-Masons like in the 1830s. But all the info is about brick layers. How else could I look this up to get the right Mason?
April 9, 2014

Social Studies
How did the Fugitive Slave Act and the Kansas-Nebraska Act further divide the North and South? What role did the concept of popular sovereignty play in these conflicts? Do you think there was any way to avoid the violence that came out of this era?
April 9, 2014

Health
How many bones is in an adult body???
April 9, 2014

physics
Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm...
April 7, 2014

English II B
Deana created a computer-assisted slide show. To make the slide show legible, what is one thing she needs to avoid? A)typing bullets in a small font B)adding color and effects to the font C)printing handouts on paper D)adding tables and graphics
April 3, 2014

English II B
Online publication, I think.
April 3, 2014

English
I think C.
April 3, 2014

English
What is the best strategy for organizing an essay to describe events in time sequence? A)comparison and contrast B)order of importance C)chronological D)spatial
April 3, 2014

English
Thank you
April 3, 2014

English
I think it's C but im not sure.
April 3, 2014

English
What is the purpose of prewriting in the writing process? A) to help polish your writing B) to find details to complete paragraphs C) to organize your thoughts within a draft D) to help develop a topic for writing
April 3, 2014

English
What is the purpose of a response-to-literature essay? A) to entertain B) to persuade C) to analyze D) to compare and contrast
April 3, 2014

physics
I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the flask had a ...
April 2, 2014

Chemistry
yes I apologize, #1 is C6H12O6 --> C2H4O2 thankyou for all your help!
April 1, 2014

Chemistry
Having trouble balancing redox equations. Teacher says I should use the method of half reactions and I'm not sure how. Any explanation or formula would be nice. C6H12O2 --> C2H4O2 SO2+H2O+O2 --> H2SO4 C2H6O+O2 --> CO2 + H2O
April 1, 2014

math
63.49 divided by 7
March 26, 2014

Physics
A 150g piece of copper is heated to 100oC. It is then held in the open air for 2 minutes and 31 seconds, and then dropped into a 100g copper calorimeter containing 200g of water at 17oC. If the rate of loss of heat of the copper piece while held in the air is 12.6J/sec, ...
March 25, 2014

Physics
Ok, but then how do you find Tf?
March 25, 2014

Physics
An aluminum calorimeter has a mass of 60g and an initial temperature of 25oC. What is the final temperature attained when 86.8g of water at 90oC is poured into it?
March 25, 2014

math
L=7+w A=LW 120=(7+w)w 120=7w+w^2 w^2+7w-120=0 (w+15)(w-8)=0 w=-15 or w=8. Length cannot be negative. Width is 8 ft. Length is 15 ft.
March 17, 2014

math
which line is perpendicular to the line y=2/3x+3
March 15, 2014

Math
What is the solution of x-(-14)=8
March 11, 2014

Math
The Mills Lunch Shop prepares fresh take-out entrees each day. On Tuesday, 40 baked chicken dinners were prepared at a cost of $3.20 each. A 20% spoilage rate is anticipated. Mills Lunch Shop sells the dinners at an 80% markup based on cost. They decided to offer a $1.00-off ...
March 5, 2014

Science
are those answers correct?
March 5, 2014

basic algebra
Boris has 10 ounces of a 10% acid solution. How many ounces of 25% acid solution should he add to make a solution that is 20% acid? Thank you.
March 4, 2014

Basic algebra
Bill drives his car 10 mph faster on the way home from work than he does going to work in rush hour. If it takes him 1 hrs. going and half an hour returning, how far away is his work?
March 4, 2014

basic algebra
Thank you.
March 4, 2014

basic algebra
A park ranger's team tags 6 wolverines. A month later, they catch 5 wolverines of which 2 have tags. Estimate the number of wolverines that live in the park.
March 4, 2014

english
which word is correct I don't want (any,no) cereal for breakfast this morning.
February 27, 2014

English
Double Negative You must not speak to (anyone, no one) about our surprise party plans. the double negetive is no one
February 27, 2014

English
Double Negatives She hasn't said (anything, nothing) about her accident. Is the answer anything
February 27, 2014

English
Prepositional phrase (In the distance,) we saw the top(of the snowcapped peak.)
February 27, 2014

English
Prepositional phrases The study (of geography) teaches us (about the features)(of other lands.) (At one time)Philadelphia was the capital (of the United States.) The report (of the secretary) was given (at the beginning)(of the meeting.) (In the glow)(of the fading light,) we ...
February 27, 2014

English
prepositional phrase The huddle(in football) was first used (by a team)(from Georgia Universtiy)(in 1896.)
February 27, 2014

English
Help with prepositional phrases Deposits(of iron ore) exist(near the western end)(of the Great Lakes.) Travelers (of a century ago) journeyed (by stagecoach.) The huge tower (of stone)(in Delhi)(in India) is a monument (to the skill)(of its builders)
February 27, 2014

English
My instructions are to choose the sentence that has the prepositional phrase underlined." part underlined" 1. I didn't want "to trust" her at the beginning. 2. The house "on the hill" was completely destroyed by fire. 3. In the early evening, ...
February 25, 2014

English
What are the subordinate clause in these sentences? 1. Brett, who is a football star, is class president. 2. Bonnie, who is an artist, is also studying computer science. 3. The composer who wrote music comes form Germany. 4. My address book, which is bright red, is gone. 5. ...
February 25, 2014

English
Are these sentences correct? 1. I can run more quickly in my new shoes. 2. Where did you find them shoes? Which sentence has the correct prepositional phrase. 1. I didn't want to trust her at the beginning. 2. The house on the hill was completely destroyed by fire. 3. In ...
February 25, 2014

Math
Well, Ms. Sue, there in lies the question? hat was how the example was written. I just started on Monday jog, thursday jog fri swim sunday jog mon swim wed jog fri swim, sat jog and figured tue was swim and jog. The question never says what day she swims!!
February 24, 2014

Math
Linda jogs every 3rd day and swims every 4th day. If she is jogging on Monday, what day of the week will she end up jogging and swimming? I say it's Tuesday? Would I be correct?
February 24, 2014

MATH
Misu Sheet, owner of the Bedspread Shop, knows his customers will pay no more than $110 for a comforter. Misu Sheet wants to advertise the comforter as "percent markup on cost." a. What is the equivalent rate of percent markup on cost compared to the 30% markup on ...
February 16, 2014

physics
If you shook the end of a rope up and down 7 times each second, what would be the period of the waves set up in the rope? s What would be the frequency? Hz
February 13, 2014

careers
Universities in India from where jobs from abroad will be offered to students after completing B.Tech in aeronautical engineering.
February 12, 2014

trig
If $5000 is invested at a rate of 3% interest compounded quarterly, what is the value of the investment in 5 years?
February 12, 2014

physics
Poissons equation for the yukawa potential is given by; Phi(r)=-(G*M exp(-alpha*r))/r what is the analogue of poissons equation for this potential.
February 10, 2014

statistics
Find the probability that among six randomly selected people, exactly four of them have brown eyes. Assume that 40% of the population has brown eyes
February 9, 2014

Physics
A dockworker applies a constant horizontal force of 73.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5m in a time 5.40s . a.) What is the mass of the block? b.)If the worker stops ...
February 7, 2014

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