Post a New Question | Current Questions
11th grade
If 720.0 mL of liquid water absorbs 80.0 kJ of heat, what will be its increase in temperature?
Monday, December 13, 2010 at 7:50pm
11th grade
If 720.0 mL of liquid water absorbs 80.0 kJ of heat, what will be its increase in temperature?
Monday, December 13, 2010 at 7:49pm
7th grade
Okay, so what are the axiom names? (honors math) Should this go in the 8th grade place? Oh well...
Monday, December 13, 2010 at 7:01pm
math third grade
There are 40 people at a picnic. There are 4 more children than adults. How many of each are there?
Monday, December 13, 2010 at 6:16pm
5th grade
how old was Anne when she died
Monday, December 13, 2010 at 5:50pm
math 5TH GRADE
Beth has 60 toy cars and trucks 75% of them are blue.How many are blue?
Monday, December 13, 2010 at 5:24pm
7th grade
A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. Help!?
Monday, December 13, 2010 at 4:36pm
10th grade math help
How do you solve? 3-3sinx-2cos^2(x) = 0
Monday, December 13, 2010 at 12:47pm
8th grade math
Can you please check my answer? A spherical balloon has a volume of 268 cubic cm. If more air is pumped in so that its radius is 3 times as long, what is its new volume? My answer: 2,412 cubic cm
Monday, December 13, 2010 at 12:29pm
8th grade math
Greta is designing a page for the yearbook and needs to know the area of her 8 in. x 10 in. picture after she crops it. If she makes the length and width of the picture 5/8 of the original, how does the area of the picture change?
Monday, December 13, 2010 at 11:59am
11th grade
Joe wants to draw a triangle.the lengths are 5cm,12cm,and 13cm. A:will joe be able to draw the triangle?why or why not?
Monday, December 13, 2010 at 9:43am
8th grade
I want write in english please help me
Monday, December 13, 2010 at 5:38am
inter med algebre
these were extra credit quest to help grade but i could not do these i asked so many people there were stumped can who gets this ques can u do the whole promlem pleasw. Questin; Pick a car and finf its top speed . Assuming that your chosen carnreaches its top speed at the top ...
Monday, December 13, 2010 at 3:55am
4th grade
it is between 1 and 2 maillion. The first three digits are the same. The least possible digit is in the thousands place. The greatest possible digit is in the ones place. the hundreds digits is 1 more than the tens digit. The sum of the digits is 21.
Sunday, December 12, 2010 at 11:39pm
8th grade
Fun and silly slogan for element "iron"?
Sunday, December 12, 2010 at 10:53pm
6th grade
analogie:After is to before as epilogue is to
Sunday, December 12, 2010 at 8:10pm
Math 8th grade
.02(2X-3)-0.03(3x(.2)=-.02
Sunday, December 12, 2010 at 8:06pm
9th grade
find two powers that have a product of 96, with at least one power greater than 1
Sunday, December 12, 2010 at 6:44pm
Grade 11 math - HELP!
The diameter of a car's tire is 52 cm. While the car is being driven, the tire picks up a nail. How high above the ground will the nail be after the car has travelled 0.1 km? can someone please explain how to solve this question?
Sunday, December 12, 2010 at 4:01pm
fractions
Mr.shafier has been teaching school for 10 years.For 6 of those years he taught 8th grade.what fraction represents the time Mr.shafier has not been teaching 8th grade?I knoe the answere is 2 5ths. but how do i show work?HELP!!!!!!!!!!!!!!!
Sunday, December 12, 2010 at 2:39pm
9th grade
the atmosphere..? a. creates tides b. has no effect on heat gain or loss c. allows heat to escape quickly in order to cool the planet d. keeps heat from escaping too quiclkly into space.
Sunday, December 12, 2010 at 1:23pm
11th grade
a rock is dropped from a 20.0m bridge falls into the river below. a.)at whqat velocity does it strike the water? b.)how much time did the rock take to reach the water?
Sunday, December 12, 2010 at 12:40pm
7th grade
500 words on (how) to write about the law of april 6th 1830?help
Sunday, December 12, 2010 at 9:23am
Grade 9 Math
There is one large rectangle ABCD, top line is AD and bottom is BC. A vertical line is drawn from the top to bottom called GH (between points AD and BC). A line is drawn from left to right called EF (between points AB and GH). AEFG is Rectangle 1. EBHF is Rectangle 2. GHCD is ...
Sunday, December 12, 2010 at 9:17am
grade 9 math
Trapezoid ABCD, top AD and bottom BC are parallel. AD is the smaller of the two parallel lines. Left AB is 45, bottom BC is 60, right CD is 30, top AD is unknown. Trapezoid EFGH is similar to ABCD, top EH and bottom FG are parallel. EH is the smaller of the two parallel lines...
Sunday, December 12, 2010 at 9:10am
11th grade
what is the gerund or gerund phrase in the sentence. Cheering the team gave me a sore throat.
Saturday, December 11, 2010 at 5:28pm
11th grade
What is the most important reason that sediments at beaches are usually rounded and smooth?
Saturday, December 11, 2010 at 3:15pm
10th grade
A volume is measured experimentally as 4.5 mL. What is the percent error, given that the correct value is 4.17 mL? answer units in %
Saturday, December 11, 2010 at 2:16pm
Math
Scores on a test are approximately normally distributed with a men of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students. What is the bottom cutoff for an A grade? Please round answer to the nearest whole number
Saturday, December 11, 2010 at 11:58am
7th grade
The population of nevada is close to 1.6 million, which is about (1)/(5 ) of michigan population. What is the estimated population of michigan?
Saturday, December 11, 2010 at 9:23am
8th grade
Solve 3r + 18 ¡Ü 6r
Saturday, December 11, 2010 at 1:01am
9th grade
what is the set of points equidistant from two given points A & b?
Friday, December 10, 2010 at 10:01pm
6th grade
if the ratio is 3:2 and length is 5 inches.what is the widith
Friday, December 10, 2010 at 9:16pm
9th grade
the perimeter of a triangle is 31 cm. sides #1 and #2 have epual length, while side #3 is one centimeter shorter than twice the length of side #1. how long is each side
Friday, December 10, 2010 at 8:19pm
12th grade international business
What is a domestic pricing model?
Friday, December 10, 2010 at 7:20pm
10th grade
If ab=6y & bc=8y What is BD In Terms Of Y.??
Friday, December 10, 2010 at 2:05pm
9th grade
what will happen if there is too much mass in the cars on a roller coaster?
Friday, December 10, 2010 at 10:21am
4th grade
What is the greatest and least possible product you can make using the digits 1,3,5,6 and 7 in the multiplication problem below? Use each digit only once, _ _ _ X _ _ = ?
Thursday, December 9, 2010 at 10:40pm
8th grade
When a truck pulls a trailer, the trailer and truck accelerate forward even though the action and reaction forces are the same size but are going in opposite directions. Why don't these forces balance each other out?
Thursday, December 9, 2010 at 10:21pm
5th grade math
3/7 cup plus 1/4 cup equals how much of a cup of mixture.
Thursday, December 9, 2010 at 8:54pm
4th grade
Jorge and Hector like to play marbles.Jorge had 7 more than four times the number of marbles that Hector had. Together they had 37 marbles. How many marbles did Jorge have?
Thursday, December 9, 2010 at 8:47pm
8th grade
An alloy of metals is 25% copper .Another alloy is 50% copper. How much of each alloy should be used to make 1000grams of an alloy that is 45% copper?
Thursday, December 9, 2010 at 8:39pm
7th grade
i need help with simple interest math homework.NOW!
Thursday, December 9, 2010 at 8:19pm
7th grade
how do i solve a+3/5=24/25
Thursday, December 9, 2010 at 7:47pm
3rd grade
What is a number sentence that shows the same product as the product of 9 and 2
Thursday, December 9, 2010 at 7:29pm
6th grade
What steps do we use to change 1-1/2 cups in half?
Thursday, December 9, 2010 at 7:01pm
science
ive been trying to find a report for 5th grade greenhouse effect science. how can i type it to find it?
Thursday, December 9, 2010 at 6:31pm
4th grade
do u know how to bulid the alamo ?well me nither so lets find out
Thursday, December 9, 2010 at 6:27pm
7th grade
I am doing a battle chart in history class the I need to know who won the Gonzales battle Also i need the mexican leader and the texas leader and who won on in the battle of the concepcion and where the goliad battle took place and when it took place also i need all the grass ...
Thursday, December 9, 2010 at 5:44pm
6th grade
I asked one of the guards a question then iI relized he was made of wax! I need help on where to put the semicolons and colons
Thursday, December 9, 2010 at 5:22pm
2nd grade
Why are the flat surfaces on a rectangular prism called faces?
Thursday, December 9, 2010 at 3:10pm
7th grade
what were the steps on mendels experiments with pea plants?
Thursday, December 9, 2010 at 2:10pm
5th grade
how to do a double line graph with 2 superbowl teams scores with their mode median,and range for the first seven games. this is so hard for fifth grade. i need help
Thursday, December 9, 2010 at 12:42pm
12th grade
Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 40 kg boy weigh on the moon? (Round answer to nearest tenth.)
Thursday, December 9, 2010 at 10:38am
10th grade
Suppose that a kid was casually sledding down a gentle slopping hill going 6 feet per second. Then, he hit a steeper part of the hill and started accelerating at a rate of 1.2 feet/second squared. At the bottom of the steep part of the hill he was going 10.56 feet/second. How ...
Thursday, December 9, 2010 at 1:58am
11th grade
I need help interpreting a quote...." in this world goodness is destined to be defeated ".
Thursday, December 9, 2010 at 1:34am
Science
I need to have an essay written about a book and the scientific relation behind it. I would do it myself but I'm not sure I know what to do and it's a large portion of my grade and it's not due until June but I need it soon as possible so I can get the worry off of...
Wednesday, December 8, 2010 at 11:21pm
6th grade
0.4/2.4=f/6 Dont know how to solve please explain so i can know thank u
Wednesday, December 8, 2010 at 10:28pm
7th grade
i need help with social stuides describe islam in the 600's
Wednesday, December 8, 2010 at 9:46pm
11th grade
I NEED URGENT HELP!! Bob is riding his bike along at 2m/s and drops his 2kg backpack from a height of 1.5 meters. What is the backpacks resulting velocity when it strikes the ground?
Wednesday, December 8, 2010 at 8:48pm
5th grade math
A set of books fills a shelf that is 24in long each book is 3/4 inch thick. How many books are in the classroom shelf? Would it be 18 ???
Wednesday, December 8, 2010 at 8:26pm
6th grade
how do you do rate of change?
Wednesday, December 8, 2010 at 8:13pm
5th grade
I need help! I am supposed to complete the table and write an equation to show the relationship. The table has input of x, 0,1,2,3,4,5 and output of y,4,10,16,22,and the last two outputs are blank. I think they are 28 and 34--but what is the relationship?
Wednesday, December 8, 2010 at 7:57pm
11th grade
how can i write a acrostic poem on beowulf?
Wednesday, December 8, 2010 at 7:44pm
4th grade
The federal government affects the whole _______ _________ and the state government affects only the __________.
Wednesday, December 8, 2010 at 7:42pm
4th grade
what is one way in which the state government and the federal government are different from each other?
Wednesday, December 8, 2010 at 7:40pm
10th grade Chemistry
What is the hydroxide ion concentration in a solution with [H3O+] = 7.67*10^-9 M?
Wednesday, December 8, 2010 at 7:25pm
5th grade
if a line is measured as 1 and 4/8 inches long explain how you could simplify the measurement
Wednesday, December 8, 2010 at 6:24pm
7th grade
WHATS 111,111 IN PRIME FACTORED FORM AND IN TREE FORM?
Wednesday, December 8, 2010 at 6:11pm
english
Im in third grade and i dont understand colons.i have to proofread a paragraph and combine them using colons.
Wednesday, December 8, 2010 at 5:57pm
6th grade
justins father says that he will not plant less than a square meter of any vegetable.design a garden with the largest possible amount of land planted in potatoes that fits the condition of the problem and hat least one square meter allotted for each vegetable
Wednesday, December 8, 2010 at 5:44pm
5th grade
What is the mode of these # 19,20,32,26
Wednesday, December 8, 2010 at 4:43pm
7th grade
2(2.5b-9) + 6b= -7 what is b
Wednesday, December 8, 2010 at 2:54pm
9th grade
a object has a mass of 30 grams and a volume of10 cm^3. what is the density of the material?
Wednesday, December 8, 2010 at 2:26pm
7th grade
a rectangular block measures 2cm * 1.5cm *1cm .the mass of the object is 31.5 grams .what is its density ?
Wednesday, December 8, 2010 at 10:25am
5th grade math
The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long? Also to find the circumference of a circle do you use the radius or diameter x 3.14?
Tuesday, December 7, 2010 at 11:33pm
6th grade
what is a good web site to find a fill in the blank persuasive essay format! please reply ASAP this is due thursday......i only have 2 more days!!!!!!!!
Tuesday, December 7, 2010 at 10:53pm
math
a roof is 2.5 feet vertically and 12.3 feet horizontally. what is the grade of the roof?
Tuesday, December 7, 2010 at 9:41pm
pre algebra 6th grade
Tara's bank account contains $250.00. She made only one deposit exactly one year ago. The bank account pays a simple interest rate of 8%. How much money did Tara deposit in the account one year ago?
Tuesday, December 7, 2010 at 9:15pm
6th grade
What are some of the similarities between the Israelites and Mesopotomians?
Tuesday, December 7, 2010 at 9:13pm
6th grade
explain how you would decide whether the product of three numbers is positive or negative
Tuesday, December 7, 2010 at 9:08pm
7th grade math
9.8c + 8d - 4.6c + 2.9d simpilfy the expression
Tuesday, December 7, 2010 at 8:49pm
2nd grade math
It is greater than 7 tens and less than 8 tens. The number. Has 4 ones. Write the number word
Tuesday, December 7, 2010 at 8:48pm
12th grade
What is the thesis of how would Bryan evaluate the ambitions of Albert Beveridge?
Tuesday, December 7, 2010 at 7:42pm
8th grade math
Matt has twice as many quarters as dimes in his coin collection. If the dimes and quarters together total $9.00 how many of each kind of coin does he have?
Tuesday, December 7, 2010 at 7:39pm
5th grade
compkete the pattern 25____61____97
Tuesday, December 7, 2010 at 7:34pm
7th grade
i need help in Math with Fractions can i have some pointer to remember it. P.s. Thank you guys if u can help
Tuesday, December 7, 2010 at 7:23pm
11th grade
a yo-yo has a mass of 0.20kg and i attached to a string 0.8m long. what isthe velocity of the yo-yo?
Tuesday, December 7, 2010 at 7:02pm
7th grade
4 reasons europeans came to the coloines
Tuesday, December 7, 2010 at 7:00pm
Math
If a wall is 6th tall and a ladder is leaning against it. The ladder is 8th tall, how far apart is is the base of the ladder away from the wall?
Tuesday, December 7, 2010 at 6:50pm
12th grade
How many moles are in 8.8*10 to the 34
Tuesday, December 7, 2010 at 6:25pm
12th grade
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.65 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.60 106 ...
Tuesday, December 7, 2010 at 5:32pm
math
franklin school has 3 boys for every 4 4 girls in fifth grade . there were 140 students in the fifth grade. A.how many are boys B.how many are gorls
Tuesday, December 7, 2010 at 5:22pm
5th grade
how much would a trapizoid worth if the triangle eqauls 1/3
Tuesday, December 7, 2010 at 4:30pm
9th grade
at 20 degrees celsius, how much sodium chloride could be dissolved in 2 L of water?
Tuesday, December 7, 2010 at 3:55pm
10th grade
2x-y=-5 -2x-5y=11
Tuesday, December 7, 2010 at 1:47pm
6th grade
for a frequency table what is the best interval for the data 1,14,6, 8, 10, 12, 15, 22, ans 25
Tuesday, December 7, 2010 at 12:48pm
8th grade
Please suggest a few topics to present in micro-soft power point
Tuesday, December 7, 2010 at 7:22am
6th grade
-20 / (-10)=
Tuesday, December 7, 2010 at 1:24am
8th grade math
After each snowstorm in Big City, USA plows remove snow from 762 lane miles of road, which is equivalent to about 48,000,000 square feet. The snowfall total was 34.2 inches in Big City, USA last winter. Suppose every snowfall evenly blanketed all road surfaces. How many cubic ...
Tuesday, December 7, 2010 at 12:37am
6th grade
-17-(-5)
Tuesday, December 7, 2010 at 12:22am
4th grade science
Where on a glacier are oraines found?
Monday, December 6, 2010 at 11:31pm
12th grade
Firm A offer 40,000 salary with $2,000 increase evey year. FIRM B offer 38,500 salary with 5% increse every year. After how many year he will make same money?
Monday, December 6, 2010 at 11:20pm
5th grade
Jen and Heather went to lunch. When the bill came, Jen discovered that she only had $8. Heather had enough money to pay the other part, or 3/5 of the bill. How much was the total bill?
Monday, December 6, 2010 at 10:49pm
5th grade
Ginny has a pumpkin with a mass of 4.8kilograms. If .9 of its mass is water, how much of its mass is water? How much is not water?
Monday, December 6, 2010 at 10:44pm
10th grade
What influences did the colonies have on the imperialist nation
Monday, December 6, 2010 at 10:17pm
5 th grade math
what is the mean for the following number? 40,60,55,45,100 ?______ what is the lest Common Multiple (LCM)for 6 and 12 ?_______ please! help me i got stuck with this today!! thank you.
Monday, December 6, 2010 at 10:05pm
5th Grade Math
I need help in using the distributive property to rewrite this expression: (7 x 600) + (7 x 400) and then multiply.
Monday, December 6, 2010 at 7:37pm
math
franklin school has 3 boys for every four girls in the fifth grade. there are 140 students in the fifth grade. a.how many are boys? b.how many are girls?
Monday, December 6, 2010 at 7:24pm
5th grade
the wright brothers had two flights on that fanmous day at kitty hawk. orville flew 120 ft.and 585 ft. wilbar flew 340 ft. and 852 ft. what was the average distance flown that day? at that rate , how many flights would it taken them to fly a mile? [rounded to the nearest whole...
Monday, December 6, 2010 at 7:19pm
7th grade
is y=x/7 a direct variation????
Monday, December 6, 2010 at 7:06pm
7th grade
how do you convert 35ibs per minutes to ibs per hour?
Monday, December 6, 2010 at 6:45pm
10th grade
I am having a hard time starting my paper on Life of Pi by Yann Martel. My thesis is: If Richard Parker is Pi Patel then Pi is God. I dont know how to begin.
Monday, December 6, 2010 at 5:59pm
4th grade
my teacher gave me this question I don't get it. If a normal person blinks 25 times per minute how old would you be your next birthday?
Monday, December 6, 2010 at 5:38pm
11th grade
How much electricity is needed to produce 120g of Calcium metal from molten CaCl2.
Monday, December 6, 2010 at 5:01pm
6th grade
what is 30 1/4-29 1/3
Monday, December 6, 2010 at 4:26pm
1st grade
how many different ways can you get to the sum of 4
Monday, December 6, 2010 at 4:16pm
forth grade math
if less than half of a garden is planted with corn is it reasonable to estimat that 2 thirds of the garden is planted with corn?
Monday, December 6, 2010 at 3:47pm
4th grade
At a school fair, you can toss coins into cups to earn points. If you earn 100 points or more you win a prize. The cups are worth 15, 20, 25, and 30 points. If you get 4 tosses and can stop whenever you reach 100 points, what are all the possible combinations of cups that you ...
Monday, December 6, 2010 at 3:37pm
10th grade
a 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. what is the kinetic energy of the bowling ball?
Monday, December 6, 2010 at 9:53am
10th grade
jordan has 2 quarters, 1 nickel, and 3 dimes. if he took 1 out and then a second one without replacing the first coin, what is the probability that both coins were dimes?
Sunday, December 5, 2010 at 11:26pm
7th grade
How are landform, like dells, formed?
Sunday, December 5, 2010 at 11:19pm
11th grade
A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box will not move...
Sunday, December 5, 2010 at 8:26pm
12th grade
I need help in Psychology do you guys do that? Or just ore subjects?
Sunday, December 5, 2010 at 5:45pm
6th grade
a bicycle wheel must make 13 revolutions to roll 25 meters. How many revolutions must the wheel make to travel 1 km? Hint: 1000 m = 1 km
Sunday, December 5, 2010 at 5:21pm
10th grade
if AB=3x-2 and BC=x+6, what is x?
Sunday, December 5, 2010 at 5:20pm
11th grade
Consider two vectors where F1 = 38 N, F2 = 58 N, and = 240o and = 25o, measured from the positive x-axis with counter-clockwise being positive. What is the magnitude of the equilibriant?
Sunday, December 5, 2010 at 4:15pm
11th grade
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.17 x 10^6 m/s. find the central force acting on the electron as it revolves in a circular orbit of radius 5.42 x 10^-11m.
Sunday, December 5, 2010 at 3:33pm
6th grade
who ordered the great sphinx to be built
Sunday, December 5, 2010 at 11:12am
Math
If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!
Sunday, December 5, 2010 at 10:02am
11th grade
what is the velocity of a boat traveling 60 km in 2 hours?
Saturday, December 4, 2010 at 8:56pm
6th grade
what is the metalloids of shininess
Saturday, December 4, 2010 at 6:23pm
10th grade
log (x-9) - 109x=log 19
Friday, December 3, 2010 at 8:49pm
7th grade
what makes a piano laugh? itsa math riddle
Friday, December 3, 2010 at 7:22pm
11th grade
the mass of a dog that weighs 100 N how many kilograms does it weigh?
Friday, December 3, 2010 at 12:00pm
10th grade
Consider the following chemical equation: NaOH (aq) + HCl (aq) ® NaCl (s) + H2O (l), the reactant NaOH?
Friday, December 3, 2010 at 10:45am
10th grade
how do you calculate the volume of the aluminum block from the apparent change in the volume of water in the cylinder?
Friday, December 3, 2010 at 8:02am
math, 5th grade
I am really stuck on how to figure this answer out, could you please help me? A stoplight flashes red for 50seconds, yellow for five seconds, and green for 65 seconds. In a 24 hour period, how long is the light red?
Friday, December 3, 2010 at 12:25am
11th grade
is Br2(L)+Cl2(g)--->BrCl(g) a balanced equation?
Friday, December 3, 2010 at 12:07am
6th grade
what is the adjectives in this sentence: The runway was visible at night because it was lit very well.
Thursday, December 2, 2010 at 11:38pm
5th grade math
If you have 78.1% nitrogen,20.9% oxygen,.9% Argon and small amounts of other gases Which graph type would best display the data? Line graph bar graph pie graph stem and leaf plot
Thursday, December 2, 2010 at 10:59pm
9th grade geometry
If two angles are alternate exteriors and one of them has the measure of 3x squared, and the other had a measure of 21x what are degree numbers
Thursday, December 2, 2010 at 10:27pm
12th grade
Find altitude of isosceles triangle if angle=53 degrees and base is 8 inches.
Thursday, December 2, 2010 at 9:35pm
5th grade
the lengths of two sides of a triangle are 15in.each.the third side measures 10 in.what type of triangle is this
Thursday, December 2, 2010 at 9:20pm
5th grade
If tickets are $.50 for children $2.00 men $3.00 women Explain how 100 people can purchase tickets for $100. No money left over and at least 1 man, 1 woman, and 1 child included
Thursday, December 2, 2010 at 8:44pm
7th grade
2.4 X 10 to the 4th in standard form
Thursday, December 2, 2010 at 8:24pm
6th grade
if james spends 5/6 of his weekly allowance seeing a movie he has how much of his allowance left
Thursday, December 2, 2010 at 7:57pm
12th grade
Angle elevation of sun is 25 degrees. Find the length the shadow cast by a tree 41 feet tall.
Thursday, December 2, 2010 at 5:56pm
6th grade
Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?
Thursday, December 2, 2010 at 5:53pm
12th grade
A farmer has 100 yards of fencing to form two identical rectangular pens and a third pen that is twice as long as the other two pens, as shown in the diagram to the right. All three pens have the same width, x. Which value of y produces the maximum total fenced area?
Thursday, December 2, 2010 at 4:52pm
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