Sunday

February 14, 2016
Total # Posts: 670

**statistics**

Advertisers contract with Internet service providers and search engines to place ads on websites. They pay a fee based on the number of potential customers who click on their ad. Unfortunately, click fraud—the practice of someone clicking on an ad solely for the purpose ...
*August 11, 2014*

**physics**

Two boat landings are 8.0 km apart on the same bank of a stream that flows at 2.8 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water?
*August 10, 2014*

**math**

What is the value of 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 + 4^5 ? a. 12 x 2^5 b. 24^5 c. 3 x 2^5 d. 4^60 e. 3 x 4^6 please answer and explain
*August 10, 2014*

**math**

If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is a. 4 inches b. 2 inches c. 1 inches d. pi inches e. 2 pi inches please answer and explain
*August 9, 2014*

**math**

I have 10 question like this, anybody can show me this one how to do it. Simplify the following and give answers in scientific notation: 0.00320 x 450,000 / 90,000
*August 8, 2014*

**math**

Write the set of integers that satisfy the sentence: I had 10 question for this,anybody can show this one how to do it. 4 > n > 0
*August 8, 2014*

**math**

In a certain boy's camp, 30% of the boys are from New York State and 20% of these are from New York City.What percent of the boys in the camp are from New York City? a. 60% b. 50% c. 33% d. 10% e. 6% please answer and explain
*August 8, 2014*

**math**

If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is a. 4 inches b. 2 inches c. 1 inches d. pi inches e. 2 pi inches please answer and explain
*August 8, 2014*

**math**

If the circumference of a circle is the same as the perimeter of the square with a side as 4 pi in, what is the area of the circle in square inches?
*August 8, 2014*

**math**

I'm just helping my younger brother.
*August 7, 2014*

**math**

so, (2600-440)/4.5=480 answer c, thank you
*August 7, 2014*

**math**

If x = 1/x^2, then 2 + 3 = a. 13/36 b. 1/5 c. 5/6 d. 1/8 e. 5/13 please answer and show work
*August 7, 2014*

**math**

I don't understand what is the question mean
*August 6, 2014*

**math**

The approximate distance,S, in feet that an object falls in t seconds when dropped from a height can be found by using the formula S = 16t^2.In 8 seconds, the object will fall a. 256 feet b. 1,024 feet c. 1,084 feet d. 2,048 feet e. 15,384 feet please answer and explain
*August 6, 2014*

**Physics**

If the thickness of the probe in the direction of B is 1.97 mm, calculate the charge-carrier density (each of charge e).
*August 2, 2014*

**math**

is it answer c. 30 + 7c?
*May 30, 2014*

**math**

why -3 , because the first 3 minutes ?
*May 30, 2014*

**math**

10 cents per minute for the first 3 minutes = 30 cents ,but I don't know what is 10-c cents for each minute thereafter?
*May 30, 2014*

**math**

43. A phone company charges 10 cents per minute for the first 3 minutes of a call, and 10-c cents for each minute thereafter.What is the cost, in cents, of a 10-minute phone call?
*May 30, 2014*

**math**

type mistake: 10 cents per minute for the first 3 minutes = 30 cents
*May 30, 2014*

**math**

10 cents per minute for the first 3 minutes + 30 cents, but I don't know what is 10-cents for each minute thereafter?
*May 30, 2014*

**math**

43. A phone company charges 10 cents per minute for the first 3 minutes of a call, and 10-cents for each minute thereafter.What is the cost, in cents, of a 10-minute phone call? a. 200-20c b.100c+70 c. 30+7c d.100-7c e. 100-70c please answer and explain
*May 30, 2014*

**math**

When a is divided by 7,the remainder is 4.When b is divided by 3,the remainder is 2.If 0<a<24 and 2<b<8, which of the following could have a remainder of 0 when divided by 8? a. a/b b. b/a c. a-b d. a+b e. ab please answer and explain
*May 30, 2014*

**math**

54. The volume of certain rectangular solid is 12x. If the dimensions of the solid are the integers x,y,and z,what is the greratest possible value of z? a. 36 b. 24 c. 12 d. 6 e. 4 please answer and explain
*May 26, 2014*

**math**

When x is divided by 3,the remainder is z.In terms of z, which of the following could be equal to x ? a. z-3 b. 3-z c. 3z d. 6+z e. 9+2z please answer and explain
*May 26, 2014*

**maths**

answer 5
*May 23, 2014*

**math**

answer a, thank you
*May 23, 2014*

**math**

Pamela owns 37.5% of the stock of a corporation and sells 2/3 of her stock at a 10% profit, What percent of this stock does she own after this transaction? a. 12.5% b. 33 1/3% c. 66 2/3% d. 72.5% e. 90% please answer and explain
*May 23, 2014*

**math**

J.C. Nichols department store reports that the average sales on Saturdays is twice that on Thursdays and the average sales on Thursdays is twice that on the other four days.What fraction of the weekly sales are made on Thursdays? a. 1/7 b. 1/5 c. 2/7 d. 1/3 e. 2/5 please ...
*May 23, 2014*

**Maths A level**

A large cylinrical tankor radius 40cm contins a liquid and at time,t the depth is h cm. There is a hole in the bottom and liuid leaks out at a rate of 32pi h to power of 0.5. Show at time t, the heighth of the liquid in the tank satisfies the diff. eqn..dh by dt=-0.02 h to ...
*May 23, 2014*

**math**

Four similar glass tumblers just fit into a cubical box.The area of the top of the circular cover of any one of the tumblers is 4 pi.The area of each side of the box is a. 16 b. 32 c. 32 pi d. 64 e. 64 pi please answer and explain
*May 9, 2014*

**math**

The ratio of boys to girls in a senior class is 5:3. If 9/10 of the boys may graduate and all the girls may or may not graduate, what is the maximum part of the senior class that may graduate? a. 3/5 b. 7/8 c. 15/16 d. 2/3 e. 27/50 please answer and explain
*May 9, 2014*

**math**

Given a circle A whose diameter is 2 ft.and a rectangular piece of tin B,10ft by 4 ft.Find, correct to the nearest square foot, the tin that will be left after the greatest possible number of circles of the size of A have been cut from B. a. zero b. 1 sq.ft c. 2 sq.ft d. 9 sq....
*May 9, 2014*

**math**

what is heron's formula I am grade 7
*May 9, 2014*

**math**

In triangle ABC, AB=2 square root 2, BC=8,angle ABC=45 degrees.Find area ABC. a. 4 square 2 b. 8 c. 8 square 2 d. 16 e. 16 square 2 please answer and explain
*May 9, 2014*

**math**

oh , because two side right
*May 9, 2014*

**math**

why + 4 ? 15+4 x 30+4 19 X 34 ?
*May 9, 2014*

**math**

I don't understant,why 15 inch x 30 inch is surrouded by a mat 2 inch wide. 15+2 x 30+2 = 17 x 32
*May 9, 2014*

**math**

A picture 15 inch x 30 inch is surrounded by a mat 2 inch wide.The aea of the mat in swuare inches is a. 60 b. 94 c. 124 d. 128 e. 196 I know the answer is e, but i don't know how to do it, anyone can tell me how to do it, thank you
*May 9, 2014*

**math**

A cow is attached to a rope 10 feet long in a pasture bordered by two fence( more than 10 feet long) meeting at an angle of 60 degree. What is the area of the space in which the cow is grazing? a. 20 pi b. 5 pi /3 c. 20 pi /3 d. 50 pi /3 e. 100 pi please answer and explain
*May 9, 2014*

**math**

why 18x26 frame 1" is not 17 x 25 ?
*May 8, 2014*

**math**

A picture 16" x 24" has a frame 1" wide.Approximately how many times greater than the area of the frame is the area of the picture? a. 5 b. 45 c. 48 d. 80 e. 84 please answer and explain
*May 8, 2014*

**math**

Abe can mow the lawn in 15 minutes.Ben can mow the lawn in 20 minutes.Carl can mow the lawn in 30 minutes.They work together for 5 minutes.What part of the lawn was mowed? a. 1/4 b. 2/3 c. 3/4 d. 4/5 e. all of it please answer and explain
*May 8, 2014*

**math**

A metal cube with an edge of one foot is melted into a rectangular solid one-eighth of a foot in height. What is the area of the top of the new solid? a. 1/64 sq.ft b. 1/8 sq.ft c. 1/4 sq.ft d. 4 sq.ft e. 8 sq.ft please answer and explain
*May 4, 2014*

**MATH**

Abe can mow the lawn in 15 minutes. Ben can mow the lawn in 20 minutes.Carl can mow the lawn in 30 minutes.They work together for 5 minutes.What part of the lawn was mowed? a. 1/4 b. 2/3 c. 3/4 d. 4/5 e. all of it please answer and explain
*May 4, 2014*

**math**

SO, THE ANSWER IS A, 0.875=0.88 RIGHT
*May 4, 2014*

**math**

The distance between two points is correctly expressed as 720 statute miles or 630 nautical miles. Which of the following most closely approximates the value of one statute mile in terms of nautical miles? a. 0.88 b. 0.89 c. 0.90 d. 1.14 e. 1.25 please answer and explain what ...
*May 4, 2014*

**math**

I still not get it
*May 4, 2014*

**math**

Four similar glass tumblers just fit into a cubical box.The area of the top of the circular cover of any one of the tumblers is 4 pi.The area of each side of the box is a. 16 b. 32 c. 32 pi d. 64 e. 64 pi please answer and explain
*May 4, 2014*

**math**

14.4 answer A thank you
*May 4, 2014*

**math**

SHURGRO fertilizer contains 18% ammonia plus carbon compounds.If 80% of the ammonia contains the chemical element nitrogen, what percent of this fertilizer is nitrogen? a. 14.4% b. 18% c. 38% d. 40% e. 62% please answer and explain
*May 4, 2014*

**math**

The terms of payment on an invoice for $2835.49 are 2/15, n/45. The balance owed after a payment within the discount period is $1135.49. What was the amount of the payment?
*May 3, 2014*

**math**

Which of the following is equal to (9^-2)+(9^-1)/(81^0)(9^-2) a. 0 b. 1/10 c. 1/9 d. 3/2 e. 10 please answer and explain
*May 3, 2014*

**math**

but could you tell me how to solution the first two equation
*May 3, 2014*

**math**

3(3)+4 9+4 13 answer e thank you, Steve
*May 3, 2014*

**math**

5x-3y=3 2x-4y=-10 3x+y=(?) a. -30 b. -13 c. -7 d. 7 e. 13 please answer and explain
*May 3, 2014*

**math**

What part of y yards is f feet? a. f/y b. 3f/y c. f/3y d. y/f e. 3fy please answer and explain
*May 2, 2014*

**math**

The sum of 4 y yards and 2i inches equals a. 6iy feet b. (12y+1/6)feet c. 12 1/6 feet d. (12y+24i)feet e. 12 1/6 iy feet please answer and explain
*May 2, 2014*

**math**

The iength of a rectangle is 3 inches greater than its width and its area is 88 square inches.An equation that may be used to find the width w of the rectangle is a. 3w^2=88 b. w^2/3=88 c. w^2+3w-88=0 d. w^2-3w=88 e. w=29.3 please answer and explain
*May 2, 2014*

**math **

On the average 800 pounds of valuable oxides are obtained from every 2 tons of ore mined.What is the ratio of valuable oxides to other material in 100 tons of ore ? a. 1:400 b. 1:5 c. 1:4 d. 2:1 e. 4:1 please answer and explain
*May 2, 2014*

**math **

How many pints of flour should be used with 3 pints of milk in a recipe which call for 2 part of milk and 3 parts of flour? a. 2 b. 3 c. 4 1/2 d. 5 e. 6 please answer and expalin
*May 2, 2014*

**math**

You have a nickel, a dime, a quarter and a half dollar. A clerk shows you several items, each a different price, any one of which you could buy with your coins without receiving change. What is the largest number of articles he could have shown you? a. 8 b. 10 c. 13 d. 15 e. ...
*May 1, 2014*

**math**

A candy dealer makes up a mixture of 3 parts of candy costing him 60 cents a pound with 2 parts of candy costing him 70 cents a pound, and 2 parts of candy costing him 50 cents a pound.At what price per pound should he sell this mixture to make a profit of 25%? a. 60 cents b. ...
*May 1, 2014*

**math**

If A=2/3B,B=2/3C,and C=2/3D,what part of D is B? a. 8/27 b. 4/9 c. 2/3 d. 75 e. 4/3 please answer and explain
*May 1, 2014*

**math**

A line segment is drawn from (-8,-6)to (0,0).What are the coordinates of the midpoint? a. -16,-12 b. -8,0 c. 0,-3 d. -4,-3 e. -3,-4 please answer and explain
*May 1, 2014*

**math**

If the area of a circle is twice the area of a triangle whose base is 4 pi and whose altitude is 4, the radius of the circle equals a. square root 32 b. 2 c. 4 d. 8 e. 32 please answer and explain
*May 1, 2014*

**math**

Formerly 1/6 of a pie cost 20 cents.Now the price of 1/8 of a pie is 30 cents.The per cent increase is a. 10% b. 20% c. 33 1/3% d. 50% e. 100% My answer is d, anybody can tell me right or wrong, if wrong tell me the answer 1/6 cost 20 cent 1/8 cost 30 cent 20/100=0.2 20-30 ...
*April 27, 2014*

**math**

I had a lot of homework 7 months= 200x7=1400 5 months= 200 year= 1600 1600/100=16 200/16=12.5 so, my answer is d but I am not sure, I want to make sure the answer, Ms Sue
*April 27, 2014*

**math**

The oil burner in a certain house is used to heat the house and to heat the hot water.During the seven cold months when the house is heated, an average of 200 gallons of oil a month is used.In the remaining five months, when the house is not heated, a total of 200 gallons of ...
*April 27, 2014*

**math**

smaller area a=pi r^2 = pi 50^2 = 2500 pi larger area a=pi r^2 =pi 52 ^2 =2704 pi 2704-2500 =204 answer d thank you
*April 27, 2014*

**math**

A pond 100 feet in diameter is surrounded by a circular grass walk which is 2 feet wide .The number of square feet of grass on the walk is a. 4 pi b. 20 pi c. 196 pi d. 204pi e. 270 pi please answer and explain
*April 27, 2014*

**math**

Use this rule to find the number of feet of lumber in a log:"Take 4 inches off the diameter of the log, multiply the remainder ( in inches ) by one half ot itself, then by the length of the log in feet, and divide the product by 8." According to this rule, the number...
*April 27, 2014*

**math**

If the area of a circle is twice the area of a triangle whose base is 4 pi and whose altitude is 4, the radius of the circle equals a. square root 32 b. 2 c. 4 d. 8 e. 32 please answer and explain
*April 27, 2014*

**math**

AOD is a diameter of circle O. The coordinates of points A and D are (-11,-5)and (-3,-5)Find the area of circle O. a. 9 pi b. 16 pi c. 25 pi d. 64 pi e. 116 pi please answer and explain
*April 27, 2014*

**math**

I don't think it is easy, can you explain how to do this problem?
*April 27, 2014*

**math**

The number of diagonals, d, in a polygon of n sides is given by the formula d=n^2-3n/2. If a polygon has 90 diagonals, how many sides has it? a. 8 b. 10 c. 12 d. 15 e. 20 please answer and explain
*April 27, 2014*

**math**

Ms.Sue x + 0.25x=35 1.25x=35 x=28 35-28=7 -------------- PsyDAG x+4x=35 5x=35 x=7 thank you Ms.Sue and PsyDAG
*April 27, 2014*

**math**

A stick 35 inches long is to be cut so that one piece is 1/4 as long as the other. How many inches long must the shorter piece be? a. 5 b. 7 c. 10 d. 12 e. 15 please answer and explain
*April 27, 2014*

**math**

Martin rides to Cambridge 30 miles away from home at the average rate of 10 miles per hour.He returns on a better road that is 50% longer where he can increase his rate by 100%.How much time does he save by taking the better road on his return trip? a. 2 1/4 minutes b. 15 ...
*April 27, 2014*

**math**

1-1/5=4/5 4/5=0.8 0.8x=32 x=40 answer a thank you, Ms. Sue
*April 27, 2014*

**math**

At the end of spring training a football coach discharged 1/5 of his squad and asked the remaining 32 boysw to report on Labor Day. The number of boys on the squad at the end of spring training was a. 40 b. 80 c. 100 d. 120 e. 160 please answer and explain
*April 27, 2014*

**mathematics**

1. did you mean 1 - 1/13= 12/13
*April 24, 2014*

**mathematics**

I don't know what is the question between 1 and 2 , the question 2 has probability (what is that mean)
*April 24, 2014*

**mathematics**

The probability of choosing a 6 at random from a standard deck of playing cars is 1/13.Use this information for 1 and 3. 1. what is the complement of the event of choosing a 6 ? 2. What is the probability of the complement of the event of choosing a 6 ? 3. You roll a standard ...
*April 24, 2014*

**math**

An apple pie 10 cm in diameter costs $1.50. Then, an apple pie 20 cm in diameter should cost a. $3.00 b. $4.00 c. $4.50 d. $6.00 e. $8.00 please answer and explain
*April 24, 2014*

**math**

The probability of choosing a 6 at random from a standard deck of playing cars is 1/13.Use this information for 1 and 3. 1. what is the complement of the event of choosing a 6 ? 2. What is the probability of the complement of the event of choosing a 6 ? 3. You roll a standard ...
*April 24, 2014*

**math**

The probability of choosing a 6 at random from a standard deck of playing cars is 1/13.Use this information for 1 and 3. 1. what is the complement of the event of choosing a 6 ? 2. What is the probability of the complement of the event of choosing a 6 ? 3. You roll a standard ...
*April 24, 2014*

**math**

The base of triangle ABC is one half the altitude. The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...
*April 24, 2014*

**Physics**

Jack is driving with a pail of water along a straight pathway at a steady 25 m/s when he passes Jill who is parked in her minivan waiting for him. When Jack is beside Jill, she begins accelerating at the rate of 4.0 × 10−3 m/s2 in the same direction that Jack is ...
*April 23, 2014*

**math**

A pulley whose diameter is 9 inches is connected by a belt to another pulley whose diameter is 6 inches. If the larger pulley runs at 1200 revolutions per minute, at how many revolutions per minute does the smaller pulley run? a. 800 b. 1080 c. 1600 d. 1800 e. 2000 please ...
*April 23, 2014*

**math**

sorry , actuly no
*April 23, 2014*

**math**

yes
*April 23, 2014*

**math**

In triangle ABC, AF and CE meetin D. If AE=EB, BF=FC, then AD x CD/DF x DE equals a. 1 b. 2 c. 4 d. 6 e. 8 please answer and explain
*April 23, 2014*

**math**

a-x=1 b+1=x ab=? a. x^2-1 b. x^2 c. (x+1)^2 d. (x-1)^2 e. X^2+1 I don't know how to do it, any body can answer this question and step by step tell me how to do it, thank you
*April 23, 2014*

**math**

yes, answer c, thank you
*April 23, 2014*

**math**

wrong, I think is answer c
*April 23, 2014*

**math**

my answer is b, but i am not sure
*April 23, 2014*

**math**

A diver is wroking 30 meters below sea level. Another diver is taking a break on a platform directly above him that is 5 meters above sea level.How far apart are the two divers? a. 5 meters b. 25 meters c. 35 meters d. 40 meters please answer and explain
*April 23, 2014*

**math**

A=pi r^2 = pi 2^2 = 4 pi answer c am i right?
*April 23, 2014*

**math**

Square ABCD is incribed in Circle O. If the side of the square is 2 find the area of Circle O. a. pi b. 2 pi c. 4 pi d. 8 pi e. 16 pi please answer and explain
*April 23, 2014*