# Posts by Grace

Total # Posts: 667

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^3 and the straight line y=x

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^3+2x^2+x+1 between x=-1 and x=2

**calculus**

Determine l= 2e^xdx, given that l=50.2, when x=3

**calculus**

int e^5xsin3xdx =

**calculus**

int dx/3sinx+4cosx dx =

**calculus**

int x^2/(x-2)(x^2+1)dx

**physics**

A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?

**geometry**

Given that r1=6i-8j+2k,r2=4i+5j+7k,r3=-2i+j+6k is a vector. Find r1r2,r2r3,r3r1(a)30,21,-8(b)26,23,8(c)24,19,-7(d)19,27,7

**geometry**

if U=i+3j-2k and V=4i-2j-4k are vectors find U.V, 3U+V& (2U+V).(U-2V) (a)6,10,4(b)4143(c)11,4,5(d)5,11,6

**physics**

Two charges Q 1 =500/mu(C) and Q 2 =100/mu(C) are located on the XY plane at the positions r1=3/vec(j)m and r2=4/vec(i)m. Find the force exerted on the Q2(a)14.4/vec(i)+10.8/vec(j)(b)14.4/vec(i)-10.8/vec(j)N(c)10.8/vec(i)-14.4/vec(j)N(d)10.8/vec(i)+14.4/vec(j)N

**physics**

Two large horizontal metal plates are separated by 4mm. The lower plate is at a potential of (-)6v.What potential should be applied to the upper plate to create field strength of 4000v/m upwards in the space between the plates?(a)(+)22(b)(+)10(c)(-)10(d)(-)22

**World History**

I agree that it was B. The Rise of Religion.

**Probablity**

0.18

**Social Studies**

the farming are different because in new England in the winter its very cold so they can't pant in the winter, but in southern colonies it is mild in the winter so the can farm a little.

**Math**

nn jhb

**Math.....**

16

**Math**

tom had 18 comic books , while Diane and Helen had none. Tom gave 1/3 of the comic books to Diane who passed 1/3 of these books along to Helen. If Tom then gave Helen 1/3 of the books he had left, how many comic books did Helen receive from Tom and Diane

**Math**

An airplane traveled a distance d in t hours, where r>1, and arrived one hour late. The airplane would have arrived on time if it had traveled at what rate per hour? a. t-1 b. d/t-1 c. d/t+1 d. d/t-1 e. d/t+1

**Math**

Each plant of a certain variety yields 50 seeds in the early fall and then dies. Only 40 percent of these seeds produce plants the following summer and the remainder never produce plants. At this rate, a single plant yielding seeds in 1986 will produce how many plants as ...

**Language barriers**

Females are passive

**Ganguage barriers**

If a child displays discriminatory behavior in the classroom, one should

**Language and other barriers**

An example of an exceptional child is one who

**World Geography**

D. Stopping French nuclear testing in the region. ~ I just took the test ~

**Technology**

Non system disc means

**Technology**

If you want to teach whole classes how to use computers, where is the best place to locate the computers?

**math**

At a point on the ground 80ft from the base of a tree,the distance to the top of the tree is 11ft more than 2 times the height of the tree. find the height.

**Physics**

What happens to the momentum of the truck if sand leaks at a constant rate through a hole in the truck bed while the truck maintains a constant velocity?

**life orientation**

6 ways in which earthquake can impact negatively on one's health

**math**

0.21 x 63 = 13.23

**Math**

A lighthouse is east of a Coast Guard patrol boat. The Coast Guard station is 20 km north of the lighthouse. The radar officer aboard the boat measures the angle between the lighthouse and the station to be 23°. How far is the boat from the station?

**Math**

My question was: "How many students can be chosen from a class of 16 to represent their class at a banquet?" If you could give me the answer, I'd be thankful.

**Chemistry**

When I solve for H^+ I put 1.7 x10^-3 x 0.26. I got 4.42 x 10^-4. My pH is 3.35. Is that right?

**Chemistry**

Substance X (MW=356gm) is a weak acid. Its Ka is 1.7x10^-3. Calculate pH of725ml of the following solutions: a)Containing 0.187 mol of substance x b)containing 127gm of Substance x I have been trying to figure this problem out for hours now and do not get it. Please help me ...

**Chemistry**

Does that mean that I do not need to do an ICE table but just use the HH equation?

**Chemistry**

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

**Chemistry**

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

**Chemistry**

Three metals P,Q and R form three ionic solids with three nonmetals X,Y, ands Z respectively as follows P2X, QY2, and RZ3. If their molar solubilities are the same, how are their Ksp values related? Please not only explain but write the respective dissociation.

**algebra 2 (permutations & combinations)**

from a standard deck of 52 cards, how many different five-card hands can be drawn?

**science**

tundra

**Math**

What property is this? 4(7+9)=(4x7)+(4x9)

**Math**

One half of 9.76

**Math**

The sunglasses that Ramon wants to buy are 50% off the original price of 85$ .How much did he have to pay?

**Math**

What is a attribute?

**Chemistry**

When 50.0ml of 1.00M HCl is titrated with 1.00M NaOH, the pH increases. calculate the difference in pH of the system when you add 49.99ml NaOH and 50.01ml of NaOH. Please work out detailed steps.

**Chemistry**

You have two buffer solutions 1) weak acid and its conjugate base 2)weak base and its conjugate acid. Write explicitly ( considering generic formula for acid and base) the equations of neutralization when you: a) add strong acid and strong base 1) b) add strong acid or strong ...

**Math**

6 quarters, 4 dimes, 3 nickels, 10 pennies. what is the probability you will get at least one of each coin in change of 1 dollar

**chemistry**

what is the total heat lost if you have 8 grams of copper and the temperature changed from 43°C to 36°C

**Statistics**

A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is the sample ...

**NJHS (essay)**

hi, i'm currently applying for the national junior honor society, and i'm working on my essay. any ideas what i should include??? ps. i have no leadership experience and the section is blank! D:

**Statistics**

Suppose a basketball player is an excellent free throw shooter and makes 90% of his free throws (i.e., he has a 90% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player gets to shoot three free throws. Find the...

**geometry**

The answers are 1-B 2-C 3-D 4-A 5-C 6-B 7-B! I took the quiz so these answers are 100% accurate.

**social studies**

Are any of you from Wisconsin connections academy?

**Basic Math Venn Diagram**

Hi! Having a lot of trouble with this one problem. The venn diagram problem is n(U)-n(B). I realize I did not post the venn diagram, I just need to know how to solve that type of problem using a venn diagram! Help would be greatly appreciated. : ) Thank you so much!! God ...

**Math**

Thx that really helped😄😃😜😝👍👍❕👏🎓🆗🆕🔝🆒 freind bump🆙

**Math**

I don't know what 4r=96 means. Also I don't know what 51=3n means!😰😁😱😨📝HELP! It's due tomorrow

**Physics**

A uniform ladder of 5.0 m long and 12 kg is leaning against the wall (contact with the wall = point b, contact with the floor = point a). The height from the ground to point b is 4m . The wall is frictionless but the floor is not. A painter of 55 kg climbs 75% of the way up ...

**math**

Compatible numbers, bench mark fractions, round

**MATH**

if 5 times a certain integer ìs subtracted from twice the square of the integer the result is 63. find the integer

**Algebra 1**

In 1991, the federal minimum wage rate was $4.25 per hour. In 1997, it was increased to $5.15. Find the annual rate of change in the federal minimum wage rate from 1991 to 1997.

**Macroeconomics**

If the economy is at point C what is the cost of one more automobile? One more forklift?

**chemistry**

a sample of sulphuric acid is 95.7% by mass and has a density of 1.84g/cubic cm.calculate the mass of pure H2SO4 in a 2.00L bottle and volume of acid that contain 200g of pure H2SO4.

**math**

poop

**Environmental Biology**

Identify two different types of businesses or corporations (be as specific as possible) that receive subsidies, through which it could be argued that environmental damage is a result. Briefly describe the environmental damage for each.

**solid mensuration**

what is the area of a section bounded by a closed elliptical figure in which the major and minor segments measure 60 cm and 45 cm

**Physics...Help!!!**

given that Earth's surface gravitaitional field strength has a magnitude of 9.80N/kg, determine the distance(as a multiple of Earth's radius re) above the Earth's surface at which the magnitude of the field strength is 3.20N/kg.

**Economics**

If businesses believe consumption will increase six months from now, everything else held constant, and they begin to increase investment, what do you predict will happen to aggregate demand?

**Chemistry**

Devise a test to distinguish between Cu2+ and Co2+.

**Chemistry**

Devise a test to distinguish between Cu2+ and Co2+.

**Chemistry II**

Devise a test to distinguish between Cu2+ and Co2+.

**science**

what do oxygen and sugars do in photosynthesis

**Algebra**

Task Type: Individual Project Deliverable Length: 3 Parts: See Assignment Details Points Possible: 150 Due Date: 11/5/2012 11:59:59 PM CT Weekly tasks or assignments (Individual or Group Projects) will be due by Monday and late submissions will be assigned a late penalty in ...

**math**

Can someone please help me? I don't know how to work this out, and my friends don't either. Eight hot dogs and ten buns come in separate packages. a. Is the number of hot dog packages proportional to the number of hot dogs? Explain. b. Is the number of hot dogs per ...

**calculus**

Write a formula for f^-1 (x) if f(x) = (x+5)/(3x-4) and state the domain of F^-1

**art need help**

Yeah! Connections Academy Questions!!! I need em all!!! Halp!!! The text book is poop on my Mac.

**physics**

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?

**Math**

I really need help

**7th grade math ms. sue please help**

Me too Tj

**BIS 245 lab**

need help

**physics**

A passenger on a moving train tosses a coin with an initial velocity of (-2.25 m/s)x unit vector + 4.26 m/s)y unit vector (from the point of view of the passenger). The train's velocity relative to the ground is (11.5 m/s)x unit vector. (a) What is the minimum speed of the...

**Math**

There are 36 students in Mrs. Keaton's sixth grade class. If 5/12 of her students are girls, how many girls are in the class? Thanks :-)

**Algebra**

4.5

**math**

al has twice as many baseball cards as frank and four times as many football cards as joe. the expression 2x+4y can be used to show the total number of baseball and football cards Al has. If the answer is y, then what is the question?

**Math**

a jar contains green,red,and blue marbles.The probability of choosing a blue marble is 1/3, the probability of choosing a red marble is 1/2,the probability of choosing a green marble is 1/6.If there are 12 marbles in the jar,and then three green marbles are added,what is the ...

**Math**

If x-2y-z=2,x-y+2z=9 and 2x+y+z=3,then z=?

**Math**

the cube has a volume of 8.If point x,the midpoint of AV is joined to point y, the midpoint of edge CD what is the length of the shortest distance from x to y?

**Math**

John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?

**Math**

John will have to make 180 monthly mortgage payments and the first payment was made on January 15,1989.If he makes one payment each month,in what year will John make his last payment?

**Math**

If the average of 10 numbers is 10 and the sum of five of the numbers is -25 what is the average of the other 5 numbers?

**Math**

A professional basketball team has won 50 out of the 75 games played so far.The team still has 45 games to play.How many of these games must the team play in order to have a season record of winning 60% of the games played?

**math**

If the surface area of a cube is 150e2 what is the volume of the cube?

**Math**

If x-1/3y=3, then the value of 3x-y-6=? a) 15 b) 9 c) 6 d) 3 e) 0

**Math**

Thank You

**Math**

oh i read the question wrong I got D

**Math**

i got E

**Math**

Brian rode his motorbike for 3 hours at 50 miles per hour and then rode the next 200 miles in 5 hours.What is the total distance he traveled? a)150 b)190 c)250 d)350 e)1150

**Math**

1)If a (theres a square)b is defined as the average of a and b, what is the value of 2 (theres a square) 4 (theres a square) 9? a) 3 b)5 c) 6 d)7.5 e) 18 2)If A=(r+s)F, what is the average of r and s when A=8 and F=2? 3) For the three numbers a,j,k, (a<j<k),the ...

**Math**

1) Mr.Anderson has 3 passenger seats in his car.He offered to drive some of the 5 members of his daughter's club to the movies. How many different groups of 3 passengers could he drive? 2) A jar has green and red marbles.If the ratio of green to red is 3:2,what is the ...

**Math**

Given (a+2,a-2)= a for all integers a, (6,2)= a) 3 b) 4 c) 5 d) 6 e) 8 The cost of a drive-in movie is $y per vehicle. A group of friends in a van shared the admission cost by paying $0.40 each.If 6 more friends had gone along,everyone would have paid only $0.25 each. What is ...

**math**

A certain store is selling an $80 radio $64. If a different radio had a list price of $200 and was discounted at 1.5 times the percent discount on the $80 model, what would its selling price be? a) $90 b) $105 c) $120 d) $140 e) $160