# krystal

Newest questions and responses by krystal-
## math

Find the sequence of the first five partial sums S1, S2, S3, S4, and S5 of the geometric sequence by adding terms. 9, 12, 16, 64/3, 256/9,... S1 = S2 = S3 = S4 = S5 =

*asked on May 11, 2018* -
## math

Find the indicated term of the geometric sequence. a1 = 7, a4 = 189/8 , 8th term

*asked on May 11, 2018* -
## Math

Find graphing solutions to 4x-y=5

*asked on January 21, 2018* -
## Math

The temperature on Monday was 14°C. On Tuesday the temperature decreased by 5°. On Wednesday the temperature decreased another 10°. On Tuesday the temperature increased by 8°. What was the temperature at the end of the day on Thursday.

*asked on October 18, 2017* -
## Calculus 1

A filter filled with liquid is in the shape of a vertex-down cone with a height of 12 inches and a diameter of 18 inches at its open (upper) end. If the liquid drips out the bottom of the filter at the constant rate of 5 cubic inches per second, how fast

*asked on October 3, 2017* -
## science

need to make a silent proof box 15,000 cubic centimeters. What is the dimensions? I am having a hard time figuring it out.

*asked on April 9, 2016* -
## science

titanium reacts with oxygen a chemical change or a physical change

*asked on September 27, 2015* -
## Business Managment

I just want to know if these are right and if not, which ones I got wrong. 1.Based on a _______ statement, a company sets long-term _______ mutually agreed on by workers and management and, from these, sets specific, short-term _______. A. vision; goals;

*asked on September 9, 2015* -
## algebra

what is the reciprocal of 5/x-1 + 3/x ?

*asked on September 1, 2015* -
## english

If i wanted to write a history of summer.. how would i start it

*asked on July 10, 2015* -
## Finite Math

State and perform the next elementary row operations that should be performed to put the matrix in diagonal form 1 2 -3 3 2 -4 6 8 3 6 15 12

*asked on July 2, 2015* -
## Math

Use the table below to answer the following question. x: 1, 2, 3, 4 y: 1, 4, 9, 16 Which is NOT true about the above table? A: It shows a linear function. B: The variable x increases by 1 each time. C: The rate of change is not constant. D: The variable y

*asked on May 12, 2015* -
## math

Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) = -5x^2 + 21x. The cost function C(x) = 2x + 10 is the cost of producing the shorts. a) How many pairs of shorts must the company sell in order to break

*asked on March 22, 2015* -
## Physics

3. An 80 kg skier is skiing down a slope (assume its frictionless) as shown in the diagram. The skier then hits a patch of sandy snow that applies a constant frictional force of 320 N directed up the slope. a. What is the skiers acceleration before hitting

*asked on January 27, 2015* -
## Math

Hi! Can you check my answers to this worksheet? They're the only questions I'm not positive about my answers on. 1. Compared to its parent function, describe the transformation of the following: y = -x3 + 2 A. Reflected with respect to x-axis, moved up 2.

*asked on January 24, 2015* -
## grade 7 math

Uniform Motion Related Problem Port A is 25 km downriver from port B. At noon a tugboat leaves port B and travels upstream at 15 kph. At 3 p.m. a hyrodrofoil leaves Port A travelling upstream at 50 kph. At what time will the hydrofoil pass the tugboat?

*asked on January 19, 2015* -
## grade 7 math

Uniform Motion Related Problem Jessie has a 15 km head start on Melvin. How long will it take Melvin to catch Jessie if the latter travels at 70 kph and the former at 100 kph?

*asked on January 19, 2015* -
## grade 7 math

Uniform Motion Related Problem Two planes leave an airport at 2 p.m., one flying south at 450 kph, the other flying north at 675 kph. At what time will they be 3 600 apart?

*asked on January 19, 2015* -
## grade 7 math

Uniform Motion Related Problem Two cars starting from the same point travel in opposite directions. Car A travels at 80 kph and car B at 110 kph. After how many hours will the cars be 760 km apart?

*asked on January 19, 2015* -
## grade 7 math

Uniform Motion Related Problem Two cars, 210 km apart, met each other in 2 hours. If one car travelled at 60 kph, at what rate did the second car travel?

*asked on January 19, 2015* -
## grade 7 math

Uniform Motion Related Problem Chester drove his car at 8:00 a.m. at speed of 45 km/hr. At 9:15a.m. Michael followed with his car. What should be Michael's speed so as to be able to overtake Chester at 1:00 p.m.? How far has Chester travelled when Michael

*asked on January 19, 2015* -
## grade 7 math

Uniform Motion Related Problem A car travelling at 60 kph left town at 9:00 a.m. Another car travelling at 65 kph left the same place half an hour later to overtake the first. At what time did the second car overtake the first?

*asked on January 19, 2015* -
## grade 7 math

Uniform motion Related Problem Five boy scouts biked to Caliraya lake at 5 km/h. their scout master gave them a ride back home in his pickup car, at 20 kph. Find the hiking time if it 6 hors longer than their riding time.

*asked on January 19, 2015* -
## International Law

Hello, I am having a hard time in finding the prosecutors list of evidence in the The Prosecutor v. Callixte Mbarushimana case. I have read documents but it doesn't give a detail of the evidence submitted. Can you please help. Thank You

*asked on October 22, 2014* -
## International Law

Hello, I am having a hard time in finding the prosecutors list of evidence in the The Prosecutor v. Callixte Mbarushimana case. I have read documents but it doesn't give a detail of the evidence submitted. Can you please help. Thank You

*asked on October 22, 2014* -
## physics PLEASE HELP

Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North)

*asked on September 30, 2014* -
## Physics please help

An ant travels 2.78 cm (West) and then turns and travels 6.25cm (south 40 degrees East). What is the ant's total displacement?

*asked on September 29, 2014* -
## Biology

What happens to arterial PO2, PCO2, and H+ concentration during moderate excercise? How and why does this stimulate an increase in breathing rate?

*asked on September 8, 2014* -
## Civics

Which best describes how the internet has contributed to cultural diffusion in the united states?

*asked on April 18, 2014* -
## Algebra 2

How would you describe the pattern of this sequence? 2/3, 4/4, 6/5, 8/6, 10/7 The formula is 2n/n+2 where n is 1, 2, 3, 4, 5

*asked on February 12, 2014* -
## Biology

Can someone please help me find a website? I am doing a project on Maple Syrup Urine Disease and need to find a website that says when the disease was first discovered or how long we have known about it.

*asked on February 11, 2014* -
## Math

Find the largest positive integer that leaves the same remainder when divided into each of 889, 961, 1009, and 1189

*asked on February 7, 2014* -
## Math

Show that the equation 155x -465y 35 has no integer solutions

*asked on February 7, 2014* -
## Math

A simple calculation will reveal that 72 has 12 factors including 1 and 72. How many natural numbers less than 100 have 12 such factors

*asked on February 7, 2014* -
## Math

Find the largest positive integer that leaves the same remainder when divided into each of 889, 961, 1009, and 1189

*asked on February 7, 2014* -
## Math

In how many ways is it possible to spend exactly $200 on pumpkins if large pumpkins cost $5 and small $3

*asked on February 7, 2014* -
## math

Value ways 2 3/5 miles each day.Bill runs 10 miles once every 4 days. In 4 days, who covers the greater distance?

*asked on February 5, 2014* -
## Computer Programming

Professor Merlin has asked you to help him. He has 100 total students in his four classes but he is not sure that all of them took his last exam. He wants to average the grades for his last exam in all four sections of his medieval literature course and

*asked on January 29, 2014* -
## Math

Let c be a constant. For what values of c can the simultaneous equations x – y = 2; cx + y = 3 have a solution (x, y) inside quadrant I

*asked on January 17, 2014* -
## Science?

I'm doing a science experiment where I have to light an object on fire to do the experiment.. It can't be oil or electrical fire. So I need some objects I can light on fire. Such as a candle. But I can't use this one

*asked on January 16, 2014* -
## Chemistry

A gas, Y, diffuses 1.05 times faster than SO2 gas at the same conditions. What is the molecular weight of gas Y?

*asked on December 3, 2013* -
## world history

what are city states?

*asked on November 7, 2013* -
## world history

list three environmental challenges facing the acient people of mesopotamia.

*asked on November 7, 2013* -
## Accounting

The owner's equity of Logan's company is equal to one quarter of the total assets. Liabilities equal $60,000. What is the amount of owner's equity?

*asked on October 14, 2013* -
## Algebra 2

At the ruins of Caesarea, archaeologists discovered a huge hydraulic concrete block with a volume of 945 cubic meters. The block's dimensions are x meters high by 12x - 15 meters long by 12x - 21 meters wide. What is the height of the block? Can someone

*asked on October 9, 2013* -
## Algebra 2

How do you get the real-number solutions of 5b^3 + 15b^2 + 12b = -36? I get to (b+3)(5b^2 + 12) and I don't know what to do after that. Can someone please show me how to finish this problem?

*asked on October 9, 2013* -
## Geography

Does anyone know a good website that shows South American countries natural resources in detail?

*asked on October 7, 2013* -
## Geography

I need a map of South America countries that shows their mineral deposits in details. Can someone please give me a website?

*asked on October 7, 2013* -
## Definitions

I have looked and looked for 4 examples of a standalone computer but I have only found two. They are a fax machine, and TiVo box. Could someone please tell me what two more examples are?

*asked on October 3, 2013* -
## Algebra 2

For the equation y

*asked on September 25, 2013* -
## Algebra 2

A stunt motorcyclist makes a jump from one ramp 20 feet off the ground. The jump between ramps can be modeled by y= -1/640x^2 + 1/4x +20 where x is the horizontal distance (in feet) and y is the height above ground (in feet). I think a is 20 feet, but I

*asked on September 24, 2013* -
## Algebra 2

For the period 1990-2002, the number s (in thousands)lf cellular telephone subscribers in the United States can be modified by S=858t^2 + 1412t + 4982 where t is the number of years since 1990. In what year did the number of subscribers reach 50 million?

*asked on September 24, 2013* -
## algebra 2

How would you solve 3x^2+8x-91=0 and 9r^2+4r+2=0 using the quadratic formula?

*asked on September 23, 2013* -
## English

What are the common nouns in these sentences? I think I have them right but I'm not sure. 1 is zone. 2 is steamboat. 3 is sister 4 is cross, and crossings. 5 is brother and animals. 6 is beavers and people 7 is voyage and world. It would be greatly

*asked on September 19, 2013* -
## Computer Definitions

What is broadband Internet Connection?

*asked on September 17, 2013* -
## Algebra 2

The arch of the Gateshead Millennium Bridge forms a parabola with equation y=-0.016(x-52.5)^2+45 where x is the horizontal distance(in meters) from the arch's left end and y is the distance (in meters)from the base of the arch. What is the width of the

*asked on September 4, 2013* -
## Algebra 2

A woodland jumping mouse hops along a parabolic path given by y=-0.2x^2+1.3x where x is the mouse's horizontal position (in feet) and y is the corresponding height (in feet). Can the mouse jump over a fence 3 feet high? Explain. I know that x is 3.25 and

*asked on September 2, 2013* -
## Algebra 2

I need to find the vertex of the parabola y=9x^2+7 but I am confused on what to use for b. I know a=9 but am unsure if b=7. Does b=7?

*asked on September 2, 2013* -
## Algebra 2

I need to find x of the quadratic function y=-5/3x^2-x-4. I'm supposed to use the formula x=-b/2a. The negative sign only applies to b. A=-5/3 and B=-1. When I substitute these values in I get -(-1)/2(-5/3). After working this out I get 1 over -10 over

*asked on September 2, 2013* -
## Algebra 2Please Help

I need to find x of the quadratic function y=-3/4x^2-4x-1 and keep getting (4)/(3/2). Is this right and if so, can it be reduced?

*asked on September 1, 2013* -
## Algebra 2

I need to find x of the quadratic function y=-3/4x^2-4x-1 and keep getting (4)/(3/2). Is this right and if so, can it be reduced?

*asked on September 1, 2013* -
## Algebra 2

I need to find x of the quadratic function y=-3/4x^2-4x-1 and keep getting (4)/(3/2). Is this right and if so, can it be reduced?

*asked on September 1, 2013* -
## Introduction to Physical Science

Hello, I always thought that sound was to loud when it hurts our ears or when sound vibration can make extremely loud noises. I am stuck on the following question: How loud is too loud? When is a sound too loud? What can be done about sounds/noises that

*asked on August 19, 2013* -
## algebra

Create your own quadratic equation that has an axis of symmetry of x = −1 and whose graph opens down. Then find the vertex, domain, range, and x-intercepts. Show all work to receive full credit.

*asked on August 14, 2013* -
## writing process part 1

I need this paragraph proof read if that's OK. also need to know if it's a fully devolved the topic a high school diploma is important to my future. A high school diploma is important to my future for a number of reasons. The First being to attend college

*asked on June 18, 2013* -
## POL201

Under the “necessary and proper” clause, Congress may

*asked on May 29, 2013* -
## chemistry

What are [H+] and [OH-] for 0.01 M perchloric acid

*asked on May 15, 2013* -
## Chemistry

0.1 mol of HCl is added to 1 L of water. What is [H+] and [OH-]?

*asked on May 14, 2013* -
## PHI103

If I move to Texas, I will need air conditioning. I don't need air conditioning. So I didn't move to Texas" is an argument form known as

*asked on April 8, 2013* -
## chemistry

How many moles of hno3 neede to prepare 7.5 l of a 5.6m solution

*asked on March 19, 2013* -
## physics

if Royce was 10 years old and he had a mass of 30kg. but by the time he turned 16 his mass has grown to 60kg. how much larger is the gravitational force between Royce and earth at age 16 compared to age 10

*asked on March 11, 2013* -
## pre cal

At a distance of 100 feet, the angle of elevation from the horizontal ground to the top of a building is 42 degrees. Find the height of the building

*asked on November 7, 2012* -
## physics

A 20.7 cm screwdriver is used to pry open a can of paint. If the axis of rotation is 2.25 cm from the end of the screwdriver blade and a force of 29.3 N is exerted at the end of the screwdriver’s handle, what force is applied to the lid? Answer in units

*asked on November 4, 2012* -
## physics

A 0.112 kg meterstick is supported at its 38.6 cm mark by a string attached to the ceiling. A 0.655 kg mass hangs vertically from the 4.74 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and

*asked on November 4, 2012* -
## physics

A 0.112 kg meterstick is supported at its 38.6 cm mark by a string attached to the ceiling. A 0.655 kg mass hangs vertically from the 4.74 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and

*asked on November 4, 2012* -
## Physics

Instructions for building a buried treasure include the following: Go 872 paces at 167 degrees turn to 286 degrees and walk 135 paces, the travel 319 paces at 152 degrees. A) Find the magnitude of the resultant displacement from the starting point. B) What

*asked on September 20, 2012* -
## Physics

A rollercoaster travels 135ft at an angle of 58.7 above the horizontal. How far does it move horizontally?

*asked on September 20, 2012* -
## Physics

tammy leaves the office drives 50 km due north, then turns onto a second highway and continues in a direction of 32 degrees north of east for 93 km. At what angle is her displacement? (consider east to be 0 degrees and north 90 degrees)

*asked on September 20, 2012* -
## calculus

The radius of the base of a right circular cylinder is r com and the height is 2r cm. Find the rate at which the surface area of the cylinder is increasing when the radius is 5 cm and the volume is increasing at 5pi cm/sec. Thank you!

*asked on May 6, 2012* -
## biochemistry

What is the net charge on Phe-Asp at each pH? a. pH 1 b. pH 7 c. pH 14

*asked on April 27, 2012* -
## biochemistry

a. What is the net charge on valine at pH 1? b. at pH 7? c. at pH 14?

*asked on April 27, 2012* -
## biochemistry

Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are

*asked on April 27, 2012* -
## chemistry

Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are

*asked on April 26, 2012* -
## chemistry

What is the net charge on Phe-Asp at each pH? a. pH 1 b. pH 7 c. pH 14

*asked on April 26, 2012* -
## chemistry

a. What is the net charge on valine at pH 1? b. at pH 7? c. at pH 14?

*asked on April 26, 2012* -
## chemistry

Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are

*asked on April 26, 2012* -
## chemistry

Benedict's reagent is used for detecting reducing sugars because _________. the —OH groups are exchanged for hydrogens. the copper ion in the reagent is oxidized as the sugar is reduced. the aldehyde group in the sugar is oxidized. a reduction of the

*asked on April 20, 2012* -
## chemistry

Benedict's reagent is used for detecting reducing sugars because _________. the —OH groups are exchanged for hydrogens. the copper ion in the reagent is oxidized as the sugar is reduced. the aldehyde group in the sugar is oxidized. a reduction of the

*asked on April 20, 2012* -
## math 11

Calculate the interest due on the following credit card balances. a)An unpaid balance of $1623.53 at a rate of 19.50% for 21 days. b)An unpaid balance of 2639.99 at a rate of 22.95% for 30 days.

*asked on April 9, 2012* -
## math 11

Calculate the amount of interest earned in 10 years on $1000 invested at 3.00% per annum, compunded annually?

*asked on April 9, 2012* -
## Math 11

Calculate the final value after 10 years if you invest 5000.0 at 2.5% per annum compunded annually?

*asked on April 9, 2012* -
## Chemistry

Both carboxylic acids and phenols react with strong bases to produce _____. gaseous products the conjugate base of the carboxylic acid or phenol a complex with water a stronger acid or phenol

*asked on March 22, 2012* -
## Math

Simplify the following expression. 8 - 4[(5 + 2)2 - (23 + 4)]

*asked on March 9, 2012* -
## chemistry

The kinds of interactions that exist between CH3COOH molecules include dipole-dipole (including hydrogen bonding) interactions and London forces.True or False Its false there are no hydrogen bonds?

*asked on March 5, 2012* -
## chemistry

True or false? Constitutional isomers and conformations have the same molecular formula.

*asked on March 4, 2012* -
## chemistry

Choose the type of shape that best matches to CH4. Linear Trigonal planar Bent Tetrahedral Pyramidal

*asked on March 4, 2012* -
## chemistry

True or false? Constitutional isomers and conformations have the same molecular formula.

*asked on March 4, 2012* -
## ENGLISH--Please Help

Can you check this for grammar mistakes? By taking a Modern World Literature class, one should expect to read novels about cultures throughout the world, and I think Snow Flower and the Secret Fan did a wonderful job in portraying the customs and

*asked on March 2, 2012* -
## chemistry

do hydrogen bonds form between methanol (CH3OH) molecules? no, because methanol does not contain fluorine or nitrogen atoms yes, because methanol has a hydrogen attached to an oxygen atom may vary depending on the temperature

*asked on March 1, 2012* -
## chemistry

Which has the higher boiling point? (a) CH3CH2CH2CH2CH3 or (b) CH3CH2CH2CH2CH2CH2CH2CH3

*asked on March 1, 2012*