Raquel

This page lists questions and answers that were posted by visitors named Raquel.

Questions

The following questions were asked by visitors named Raquel.

What were Mendeleev's reversals?How did Henry Moseley explain them? Mendeleev thought the periodic table was in order of atomic mass. Mosley determined that atomic number was the correct order. http://www.chemistry.co.nz/henry_moseley.htm

A wrench .9m long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of (0,1,3) at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 J of torque to the bolt. This is the...

How do i solve the pair of simultaneous equations y=x^2-3x-12 and y=2x-16 and epxress y=x^2-3x-12 in the form y=(x-h^2)+k, where h and k are constants Hence determine the minimum value of the function y=x^2-3x-12 I have a few of these to do, so if someone...

factorise: d2 + 2d + 1 - e2

What was the role of the Nazi party? Why were Jews denied citizenship?

0.1kg of ice initially at a temperature of -10 degrees Celsius is added to a cup with .5kg of water initially at 20 degrees Celsius. The water and ice are isolated thermally from their surroundings. The specific heat of ice is 2000 J/kgoC, the specific he...

•provide an example of how one domain of development impacts the other two.

find cos (x/2) when sint =12/13

A figure is made of a row of squares. One square has a perimeter of 4. Two squares have a perimeter of 6, and so on. Finish the input-output table to show the pattern.

The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power ove...

A wire measures 137 centimeters in length. The shorter piece is 13 centimeters short. find the of length each piece.

Eight students tried out for the band or chorus. Five students tried out for band, and the rest tried out for the chorus. How mwny students tried out for the chorus?

Doug has 170 stamps in his two-book collection. his first book of stamps has 30 more stamps in it than his second book. How mwny stamps are in each book?

Mr. Burns ran 14 miles last week. He only ran on Monday, Tuesday, and Wednesday. If Mr. Burns ran 3 miles on Tuesday and 5 miles on Wednesday , then how many miles did he run on Monday?

round to the nearest ten and hundred. 997

round to the nearest tens. 646

round to the nearest thousand 9612

round to the nearest tens 362

Charollets Web How did Wilbur respond to the lamb saying "Pigs mean less than nothing to me"

Leslie saw 8 squirrles at the park. She saw 5 birds and 12 ants. how many more ants and birds did Leslie see than she saw squirrles?

Sophia went to an amusement park. She went on 18 rids in all. 7 of the rides were roller coasters. How many of the rides Sophia went on were not roller coasters?

How do I solve this algebra questions, 2n+4n+4=-8, 9=5+4t, at+2=12, 2x+3=7, 3b+6=12, m/6+5=7????

What is the van't Hoff factor for K2SO4 in an aqueous solution that is 5.00 % K2SO4 by mass and freezes at -1.21 ∘C?

Compare and contrast a desert ecosystem and a forest ecosystem.

There are 18 students in the classroom. There ate 2 students in each group. How many groups of students are there?

Bryce draws 40 stars on a poster. He draws 5 rows and puts the same number in each row. How many stars ate in each row?

Sarah has 10 stuffed animals. Explain two different ways she can group the stuffed animals so each group has the same number and no stuffed animals are left over?

Explain how you know if a number can be divided by 10 evenly.

The measure of how much material makes up an object is the?

What is 7r + -5

Ricky has 16 coins consisting of P5 & P1 coins amounting to P44. How many of each kind does he have?

Mother has P1 coin, P5 coins and P10 bill in her purse. In all, she has P112. She has two more P1 coin than P5 coins and one More P10 bills than P1 coins. How many of each kind does she have?

One positive integer is three moee than twice another and their sum is greater than 65 but less than 75. What pairs of integers satisfy this conditions?

Eric has 48 bills valuing P1,500 to be deposited in a bank. If the bills consistedmof P20 & P50 bills, how many P50 bills does he have?

A university drama production sold a total of 400 tickets for P18,500. If student tickets sold for P40 & guest tickets for P60, how many tickets of each type?

A Square shaped animal pen and a pen shaped like an equilateral triangle have an equal perimeters. Find the length of the sides of each pen if the sides of the triangular pen are 16 less than twice a side of the square Pen.

If two inlet pipes are open, they can fill a pool in 1 & 12 minutes, one of the pipes can fill the pool itself in 2 hours. How long will it take the other pipe to fill the pool by itself?

A woman invested some money at 8% and some at 9% annual simple interest. The interest for 1 year on the combined investment of $10,000 was $860. How much was invested at each rate?

A merchant wants to mix gummy worms worth $7 per pound and gummy bears worth $3 per pound to make 30 pounds of a mixture worth $4.60 per pound. How many pounds of each type of candy should he use?

The ticket prices for a movie are shown in the illustration. Receipts for one showing were $1,990 for an audience of 215 people. How many general admission tickets and how many senior citizen tickets were sold? (General admission tickets: $10 Senior ticke...

A rectangular-shaped dance floor has a perimeter of 164 feet. If the floor were 44 feet wider, its width would equal its length. Find the length and width of the dance floor.

A boat can travel 48 miles downstream in 4 hours and can make the return trip in 6 hours. Find the speed of the boat in still water.

An airplane travels 1260km in the same time a car travels 429km. If the rate of the car is 120kph less than the rate of the airplane, find the rate of each.

Find two consecutive integers such that 1/5 of the first less 1/9 pf the secondnis 3

A boat travels 28 km upstream in 7 hours. It travels 48 km downstream in 4 hours. Find the speed of the boat and the speed of the stream.

A natural number decreased by 30 times its reciprocal is 1. Find the natural number.

Imelda's plane travels at a speed of 350kph in still air. One day, she travels 169km against the wind at the same time it takes to travel 190km with the wind. Find the speed of the wind.

Tom can clean the living room in 45 minutes. Wally can clean it in 30 minutes. Both start cleaning and 5 minutes later their sister Gigi joins them taking them 7 minutes more to finish. How long would it take Gigi to clean the living room alone?

In an automobile race, the rate of one car was 120 mi/hr and the rate of another was 105 mi/hr. If the faster car finished the race 20 minutes before the slower one, what was the distance of the race?

120t = 105 (t+1/3) Find the disrance

Driving from Tulsa to Detroit, Takimi average 50mph, he figured thatnif he had average 60mph his driving hours would have decreased 3 hrs. How far is it from Tulsa to Detroit?

Three years ago, Wendy's age was 3/4 as old as Erna and Lucys age was 2/3 as okd as Erna. If the sum of their ages is 67, find the present age of each.

What is the value of x and y in the equation 7y= 2x+28.

Y-2x=4 solve for x and y with graph

A salmon swims 15 miles downstream from its birth to the ocean in 3 hours. The return trip upstream to spawn takes 5 hours. How fast does the salmon swim in still water?

Joe takes twice as long as to row against a current as with it. If he rows 6 miles an hour in still water, what is the rate of the water?

Not counting the "turn around" , a helicopter carrying passengers between an airport and the roof of a downtown skycraper 20 miles away can make the round trip in 15 minutes. The helicopter flies 2 miles away with the wind when the time it flies 1 mike ag...

The air speed of a plane is 150 mph. If the plane traveled the same distance in two hours with the wind as it flew in 3 hours against the wind, what was the wind speed?

A motorboat travelling at full speed against a current goes 15 miles in one hour. Travelling at half speed with the current, it goes 12 miles in an hour. Find the rate of the current.

A boat traveled 36 mi up a river in 3 hours, returning downstream, the boat took 2 hours. What is the boat's rate in still water and what is the rate of the river's current?

Rosa is 14 years older than her sister Amy. 3 years ago, she was 3 times as old as Amy. How old are they now?

A laboratory technician wishes to mix a 70% saline solutio and a 20% solution to prepare 500ml of a 40% solution. What amount of each solution should be used?

Triangle DOG is congruent to triangle CAT, DO=5, OG = 6, DG = 7 and CA = 2x + 1. Find x

TriangleWED is congruent to triangle FRI, angle W = 80degrees, angle D = 45 degrees, angle E = 55 degrees and angle R = 4x + 10. Find x

If y = 3 is a horizontal asymptote of a rational function, which must be true? A) lim x→ 3 f(x) = 0 B) lim x→ 0 f(x) = 3 C) lim x→ ∞ f(x) = 3 D) lim x→ 3 f(x) = ∞ My answer is B

A children's park is 350m long and 200 m wide. It is surrounded by a pathway of uniform wittd. Suppose the total area of the park and the pathway is 74,464 meter square. How wide is the pathway?

find the value Of k of the product pf the roots of 2x square - 6x + k = 0 is 4.

Two numbers differ by 6. The sum of their squares is 116. Find the biggest number.

The difference between a number and its reciprocal is 7/12. Find the number.

The square of a certain integer plus three times itself equals 18. Find the integer

A carpenter is to use 12m of wood to construct a picture frame.what is the maximum area of the frame

A manufacturer is in the business of producing small figurines. He finds that the daily cost in pesos,P, of producing n figurines is given by P= n2-120 +4200. How many figurines produced per day so that the cost will be minimum?

What number or numbers are equal to thrice their own square root?

If a=25cm and b=2meters, what is the ratio of a to b?

Given triangleABC proportion to trianglePQR. If AB=4cm, BC=6cm, AC=9cm, and QR=4cm, find the perimeter of trianglePQR. What is the ratio of similitude?

What should be the value of x so that the ratios 4:10 and x:12 will form a proportion

Two sides of a triangle are 8cm and 12cm long, and the altitude to the 8-cm side is 9cm. How long is the altitude to the 12-cm side?

If a 6-foot man has a shadow of 9 feet, how long a shadow would a 20-foot pole have?

In trianglePQR, if AB//QR, PA=3cm, PQ=8cm, and QR=9cm, how long is AB?

If AB//CD//EF, BD=12cm, DF=16cm and AE=35cm, find AC

Given triangleABC proportion to trianglePQR. If AB=4cm, BC=6cm, AC=9cm, and QR=4cm, find the perimeter of trianglePQR

Given triangleABC proportion to trianglePQR. If AB=4cm, BC=6cm, AC=9cm, and QR=4cm. What is the ratio of similitude?

Genetics problem please help the whole homework assignment is due tomorrow at 4:10 pm A researcher is interested in two important phenotypes in sorghum: stem color and seed sweetness. Use G for red stems and g for green stems. Use S for sweet seeds and s...

Genetics problem please help the whole homework assignment is due tomorrow at 4:10 pm Packrats exhibit many interesting behaviors. Let's say that the trait of bringing home fun shiny objects (controlled by the allele H) is dominant to the trait of bringin...

How can controls and the data being produced be used to troubleshoot an experiment?

A baseball field is filled with 169 square meters of clay. This covers all the surface area between all bases. What is the distance from first to second base?

How to find the 4 corners of a circle?

Answers

The following answers were posted by visitors named Raquel.

A wrench .9m long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of (0,1,3) at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 J of torque to the bolt. This is the...

Ok Reiny i get that i have to square the 1st row to come up with the 2nd row, but i still don't get how i come up with the 3rd row?

thank you so much Ms. Sue

I used 4*pi*r^2 for the Area and got 3.96E26 W for the Power is that right?

11miles-5miles=6miles

round to the nearest tens. 324

round to the nearest tens. 575 that would be rounded to 580 right?

Thank you for your help.

My Home work is online. When I gave that answer it said 3 is wrong.

This is college chem 132

Thank you very much Alyssa.

Thank you very much Ms. Sue

18/2=9 Thank you

Oh wow. I was reading way to much into the question. Thanks again Ms Sue you are my hero.

Can you help me find the volume of a cube of zinc with the following dimensions: 3.000cm, 3.1cm, 2.99 cm?

A square shaped animal pen and a pen shaped like an equilateral triangle have an equal perimeters. Find the length of the sides of each if the sides of tje triangular pen are 16 less than twice a sidemif the square pen.

I don't know cam you explain me

$2000 at 8% & $8000 at 9% interest was invested.

How would I write out this problem to solve?

I am having a problem remembering how to word it to solve the problem...

Amy and Deborah are roommates. They spend most of their time studying (of course), but they leave some time for their favorite activities: making pizza and brewing root beer. Amy takes 5 hours to brew a gallon of root beer and 3 hours to make a pizza. Deb...

A motorist Drove 100km. if he had gone 5 km per hour faster he could made his trip 1 hour less time. how fast did he drive?

Two supplementary angles are in the ratio 5:7. Find the larger angle

Two million four hundred thirty thousand ninety

For his 2nd Experiment, Gregor Mendel self-fertilized plants from the First generation to produce the second generation. However, dogs can’t self-fertilize. So you should use two offspring from the first generation to produce the second generation.