Posts by Sandy

Total # Posts: 821

Chemistry
1. A student uses 6M HCl solution contaminated with Al(NO3)3 to wash the nichrome wire in between recordings of emission spectra for the different known and unknown metal ion solutions. The emission energies for the aluminum are 3.90x10^-19 J/atom, 3.58x10^-19 J/atom, and 2....

Math
Thank you

Math
I am confused with rule of pattern 1,3,6, I figured out 10 is the next number Rule: find the difference and add 1 to the next item

Math
State the rule for this pattern: 1,5,11,19 What about: subtract the last number and add 2 to the next term

math
Is this correct:find the difference and add 2 to the next term

Math
What about subtract the last number and add 2 to the next term

Math
State the rule for this pattern: 1,5,11,19 I want to make sure this is correct add the last number from before and 2 more

social studies
Thank you

social studies
The rise was the fertile land the fall was the civilization becoming overpopulated.

social studies
What patterns do you see in the rise and the fall of many civilization in the Fertile Crescent?

Math
692-405=287 miles

Math
It is 405 miles from Minneapolis, Minnesota to Chicago, Illinois. It is 692 miles from Minneapolis to Cincinnati, Ohio. Cincinnati is how many miles farther from Minneapolis than Chicago? Write an equation and solve the problem

Psychology
1. A company decides to add a new program that prepares randomly selected sales personnel to increase their number of sales per month. The mean number of sales per month for the overall population of sales people at this national company is 25 with a standard deviation of 4. ...

physics
You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 294 N for 7.6 s, during which time the refrigerator moves a distance of 3.2 m at constant velocity. (a) What is the total work (by all forces) done on the refrigerator? (b) What is...

math
12

Computer Science
I need help with this problem. I don't know how to set it up correctly. Input a list of positive numbers (terminated by 0)into an array, and output the result. Use a subprogram to output the numbers, a function to find the mean, an a subprogram to output the result. I know...

humanservices101
Critical thinking question: how is current child welfare policy and practice shaped by religious and philosophical beliefs, societal structures, and economic systems?

English
Please evaluate the writing, grammar, style, spelling as well as content. People take out oil from the sands in AB so we can drive and leave tailings ponds. This caused a lot of damage to the land and negative impacts to wildlife. Natives get sick from eating to many fish from...

Accounting
Why is it more difficult to account for the inventory of a manufacturing firm than for that of a merchandising firm?

Algebra
Find the average speed Hike 52 miles in 3 days Drive 69 kilometers in 3/4 hour

public speaking
when using the internet to conduct research,it is most important to?

social studies; same study diff question
which one of the following conclusions is supported by the results of these studies? 1)characteristics other than one's name have no effect on academic achievement. 2)Unusual names do not determine intellectual development. 3)Ethnic group membership is the main factor ...

Math
Is this a trick question? I need to write the number 79 in short word form, would it be seventy 10's and one 9 or 10 sevens and 9 ones? Please, please, please help me Thank You

Math
Would 72,060,964,765 look like the following in it's expanded form? 7X 10,000,000,000 + 2X 1,000,000,000 + 0X 100,000,000 + 6X 10,000,000 + 0X 1,000,000 + 9X 100,000 + 6X 10,000 + 4X 1,000 + 7X 100 + 6X 10 + 5X 1 been working on this for 1 hour!

Physics
A car driving at 14m/s hits the brakes and comes to a stop in 4.1 seconds. What was the car's acceleration during this stop?

History
I have a paper I must do and have been trying all summer to finish. I have read the book The Story of Sacagawea and now what I need to do is write what the main idea/topic is ( which I know is Sacagawea) but then I have to write a main idea's # 1 and # 2 and details to ...

Can you please write this into terms easier to understand? Thanks! Private life was infected with impurity to which licentiousness of the Catholic clergy appeared like innocence.

Oh. Ok. Makes sense. Thanks!

Can you please rewrite this sentence into terms easier to understand? Thanks. Now celibacy yielded to widespread clerical concubinage and, in the convents, to promiscuity.

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball. h1(t) = h2(t) = When does ball 1 reach the ground? Round to the nearest ...

Physical science
Why are models important?

Phoneix
Jarman consulting inc. provides financial and estate planning services on a retainer basis for the executive officers of is corporate clients. it incurred the following labor costs on services for three corporate clients during march 2006. Driect labor contract 1 \$12,000 ...

English
Why is the ability to draw conclusions important in research? A. To discover the effect of the topic B. To enable further research C. To generate topic sentences D. To formulate a plan for research Is It A. ??

geometry
On my last question, just posted, I asked what percent of the area of the target was shaded. The answer options were 5%, 10%, 20% or 80%?

geometry
There is a square with a star inside. The square has 25cm to show the length of one side. On the right, outside the square, it says 125cm squared, with a line pointing the center of the star in the square. The question is; The target of a shooting game features a shaded star ...

Math
I think this is geometry: There is a small box with a black frame around it. Inside the box, at the bottom, is an 8. Inside the box, to the right, is a 2. It looks like they are showing Length & Height. On the outside of the box, under the 8, there is a 10. To the right, ...

Science
whatever

Science
please help i know but y u guys r like that ? so rude mean ugly y ??

Science
What?!

Science
Describe what happens to body systems over time from infancy to adulthood to older adulthood. In your own words please. thank you guys ;)

algebra
slope line of (-1,3)(4,5)

Algebra 2
line slope (0,3)(5,7)

math
The ratio of boys to the total number of students is 2:5. If there are 123 girls, how many boys are there? I estimated 49.2, is that correct?

math decimals
Is 1/6 > or< 0.16, because the repeating decimal in 1/6 is what confuses me.

Crocket
A 143m wire is cut into three pieces. The second is 3m longer than the first. The third is 4/5 as long as the first. How long is each piece?

statistics
Suppose we take a random sample of size n from a normal population with variance, σ2 . It can be shown that (n−1)s2/σ2 has a chi-square distribution with n−1 degrees of freedom, where s is the sample variance. Below is a random sample of size 8 drawn from...

Social Studies
1) From 1892 to 1954, millions of immigrants entered the United States through an immigration station in the Northeast called a. Empire State Station. b. Big Apple Harbor. c. Manhattan Port. d. Ellis Island. 2) Northeastern cities are important trade centers. Which of the ...

biology
Less water flowing into it, which can change the mineral and salt composition of the water, cause changes in flow and temperature, and these in turn can dramatically change the types of plant and animal life in the area. Of course, this is a moot point because virtually all ...

Statistics
Consider the hypothesis test given by Ho:u=530, H1:u does not equal 530. In a random sample of 85 subjects, the sample mean is found to be 522.3. Also, the population standard deviation is 29. Determine the P-value for this test. Is there sufficient evidence to justify the ...

Math
The IQ scores are normally distributed with a mean of 100 and a SD of 15. A) What is the probability that a randomly person has an IQ b/t 85-115? Show work B) Find the 90th percentile of the IQ distribution? C) If a random sample of 100 people are selected, what is the SD of ...

BUT AT LEAST HE TRY GOOD TRY MAN GOOD TRY :D

LOL SO FUNNY MAN HAHAHA LOL........... ;)

Math
Thank you

Math
in division why should the remainder not be greater than the divisor

math
a race track is a mile around circle which equals 5,280 circumference. To find the diameter (the the width of the center of the circle) do I divide the 5,280 by 2?

Science
Describe how you would prepare 25.0ml of a 1.00 M NaOH solution.

Geometry
Oops, I'm sorry i got confused the answer is pi(21)^2 = 1384.74

Geometry
I'm so sorry but i'm in a huge rush ms.sue :( !

Geometry
Is it a) 137.6mm2 is the answer because that's what I got ?

Geometry
OK, I'm so so sorry. It would never happen again! OK thank you so much when i'm finish I'll will tell you the answer OK? :D

Geometry
NEED HELP!!! :( I'm new here so ..... i don't know :( ????!!!

Geometry

Geometry
1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. a) 16.0 mm b) 26.4 mm c) 8.4 mm d) 33.5 mm 2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth. Diameter = 42.0 mm a) ...

Statistics
A simple random sample of 120 SAT scores ahs a mean of 1540. Assume that SAT scores have a population standard deviation of 333. a) Construct a 95% conf. interval estimate of the mean SAT score. b) Is a 99% conf. interval estimate of the mean SAT score wider than the 95% conf...

statistics
Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. A recent study of the ...

statistics
Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. A recent study of the ...

math
sam, pam, ken, and jen wrote each of their names on a slip of paper and placed them in a bowl.Sam was the first to randomly select a name from the bowl. What is the probability that he will select his own name? express answer as a fraction and a percent.(B)If sam selects Pam ...

statistics
otorola discovered that the average defect rate for parts produced on an assembly line varies from run-to-run and is approximately normally distributed with a mean equal to 3 defects per million. Assume that the goal at Motorola is for the average defect rate to vary no more ...

statistics
A local country club has a membership of 600 and operates facilities that include an 18-hole championship golf course and 12 tennis courts. Before deciding whether to accept new members, the club president would like to know how many members regularly use each facility. A ...

science
what is the main cause of global wind patterns?

science
Some parts of the atmosphere are warmer than others. This causes air particles to-------,which in turn causes the wind. Moves heat by conduction form convestion currents move by radiation become more dense. I am just having a hard time finding the answer to this question.

math
\$800 worth of tickets were sold.adult price is \$6.children is \$3 and seniors \$2. 90 adult purchase ticket,60 children purchase tickets.how many tickets were purchase at senior price and how would you write an equation and solve to find the solution? how do you explain the ...

ENGLISH !(:
the answer to which of the following groups of words is a clause is If the catcher dropped the ball. catcher is the subject, dropped the ball is the predicate dropped is the verb. The answer to the qestion What is the phrase in the following sentence I believe is a sports ...

math
john is think of a number. If you divide the difference of his number and 12 by 7, and then add 23, the result is 32. what is the number and can you explain your answer?

algebra
an investor invested a total of 1,100 in two mutual funds. One fund earned a 5% profit while the other earned a 2% profit. If the investor's total profit was 49.00 how much invested in each fund?

algebra
on a scatter plot how can you determine if driving speed and driving time show a positive, negative or no relationship?

social studies
List three continents that are located in both the northern and western hemisphere?

Finanical
4. An investor purchases a mutual fund share for \$100. The fund pays dividends of \$3, distributes a capital gain of \$4, and charges a fee of \$2 when the fund is sold one year later for \$105. What is the net rate of return from this investment?

Finanical
4. An investor purchases a mutual fund share for \$100. The fund pays dividends of \$3, distributes a capital gain of \$4, and charges a fee of \$2 when the fund is sold one year later for \$105. What is the net rate of return from this investment?

Chemistry
When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and 298 K ? b) What amount (in moles) of H2 was ...

Chemistry
Compute the volume of helium at 1.0 atm and 298 K that will be collected if 2.5 g of 222Rn is stored in a container able to expand to maintain a constant pressure for 15 days. Assume that 222Rn decays to 218Po with a half-life of 3.824 days.

Chemistry
Health regulations stipulate that the amount of arsenate in drinking water be no grater than 10 parts per billion (ppb) arsenic. If the arsenic present is arsenate, AsO4^-3, what mass of sodium arsenate would be present in a 1.00 L sample of drinking water that just meets the ...

math
570 feet

math
A cylindrical container has a volume of 226 cubic inches. the container is filled 3/4 of the way with water. To the nearest cubic inch, what is the volume of water in the container? How many more cubic inches of water is needed to fill the container? please explain.

Algebra
Please show me step by step if possible: Find dimensions of a rectanglar rug whose perimeter is 28 ft and whose area is 45 ft². The length (longer side) equal ___ft and width (shorter side) equal ____ft.

Algebra
Please show me step by step if possible: Find dimensions of a rectanglar rug whose perimeter is 28 ft and whose area is 45 ft². The length (longer side) equal ___ft and width (shorter side) equal ____ft.

math-urgent
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function: u(t)=T+(u-T)e^kt K&...

Algebra
Do anyone know what the domain and vertical asymptote is for: f(x)=4 ln(x)

math
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function: u(t)=T+(u-T)e^kt K&...

math
K= -1/-2.5 sorry for the mix up

math
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function: u(t)=T+(u-T)e^kt K&...

Algebra
Could someone please help me with this word problem? The City Zoo has different admission prices for adults and children. When three adults and two children went to the zoo, the bill was \$80.88. If two adults and three children got in for \$76.47, then what is the price of an ...

Algebra
Please show me step by step in finding the center and the radius of the circle, then graphing if possible: (x-3)²+y²=6 Thanks

Algebra
will you please show me step by step in solving: 1/2 log b + 3 log c. I need to express as a single log logarithm and if possible, simplify Thanks

Algebra
Please show me step by step on solving this problem? log₅(2x-9)+ log₅(x+2)= 1 Thank you I'm getting 2x²-5x-28=0 which is a empty set. Trying to make sure I'm correct if I am. Thanks so much for your help

algebra
ln x¹³ = (ln x)² please show me how to solve this step by step Thanks

chemistry
The molar volume of a certain form of solid lead is 18cm3/mol. Assuming cubic closest packed structure, determine the number of Pb atoms per unit cell.

chemistry
The hybridization of the lead atom in PbCl4 is...?

A solid, uniform disk of radius 0.250 m and mass 51.1 kg rolls down a ramp of length 4.60 m that makes an angle of 18° with the horizontal. The disk starts from rest from the top of the ramp. a)Find the speed of the disk's center of mass when it reaches the bottom of ...

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