Wednesday

February 22, 2017
Total # Posts: 69

**physic**

A student stands on a rotating disk holding 4-kg objects with each hand. hen his arms are extended horizontally, the object are at 0.8m from the axis of rotation and he rotates at 0.7 rad/sec. The moment of inertia of the student plus the disk is 3.00 kgm^2 and is assumed to ...

*February 5, 2015*

**physic**

A 25 gm bullet is fired into a 2.25kg ballistic pendulum and becomes embedded in it. If the pendulum moves a vertical distance of 10cm, calculate: A. The speed of the system after collision B. The initial speed of the bullet C. The percentage of the energy lost in the process.

*February 5, 2015*

**physic**

A 0.25-kg punk, Initially at rest on a frictionless horizontal surface, is struck by a 0.20kg punk that is initially moving along the x-axis with a velocity of 2.20 m/sec. After the collision, the 0.20 kg punk has a speed of 1.5 m/s at an angle of 37 to the positive x-axis. ...

*February 5, 2015*

**physic**

A wheel on a moving car slows uniformly from 420 rpm to 120 rpm in 4 sec. A. What is the angular acceleration of the wheel? B. What is the angular displacement? How many revolutions? C. How far does the car travel if the radius of the wheel is 0.20cm?

*February 5, 2015*

**Social Studies**

Here is all the answers not including 12&13 D A B A D C D D B A A promise that this is correct

*April 8, 2014*

**Science**

Those are trolls! They aren't the real Maddie and Mackenzie!

*December 23, 2013*

**Algebra II**

Find the inverse funciton: g(x) = 3x^4, x > 0

*April 30, 2013*

**algebra 2**

how to solve (x -3)^4 = 116

*April 17, 2013*

**Algebra II**

write a fourth degree polynomial function a leading coefficient o 1 given three of its zeros are -1, 3 and 2i, then re-write it in simplified form.

*April 5, 2013*

**Algebra II**

Write a quartic funciton that has 2 real and 2 imaginary roots and rewrite the polynomialin standard form.

*April 5, 2013*

**Algebra II**

simplify (2x^-4 y^-2 / 3x^-6 y^-8)^3

*April 5, 2013*

**Algebra II**

Given x(x) = 2x^3 - 6x^2 + 8 Rewrite the given equatin in factored form.

*April 5, 2013*

**Algebra II**

What is the simplified form of (1/2x^-2)^3 X^7?

*April 5, 2013*

**Algebra II**

Which of the following is a function? A) -x^2 + 2y^2 - 4 = 36 B) {(6, -5), (-1, -5), (-4, -5)} C) {(-5, -4), (-5, -3), (-3, 6)} D) x = y^2 - 3

*January 21, 2013*

**geometry**

Earth has a diameter of approximately 8000 miles. Jupiter's diameter is approximately 88000 miles. How many times greater is the volume of Jupiter than the volume of Earth?

*May 23, 2012*

**geometry**

A regular hexagon has an area of 96sqrt3. What is the length of each side of the hexagon?

*May 10, 2012*

**geometry**

the quesiton is land in the circle, but outside the triangle. Is it the probability is (AC - AT)/AC 81.22/113 x 100% = 72%

*May 10, 2012*

**geometry**

A 30-60-90 triangle is inscribed in a circle. The length of the hypotenuse is 12 inches. If a coin is tossed on the figure, what is the probability that the coin will land in the circle, but outside the triangle?

*May 10, 2012*

**geometry**

A 12-foot guy wire is to be attached to a tree at a 30 degree angle to the ground. At what height on the tree should the guy wire be attached? How far from the tree should the wire be attached to the ground?

*May 8, 2012*

**geometry**

You have a rectangular prism. The center section has been removed. The base of the original prism is 6in wide and 8in long. The height of the prism is 10in. What is the total exposed surface are of the new prism?

*May 8, 2012*

**geometry**

A 30-60-90 triangle is inscribed in a circle. The length of the hypotenuse is 12 inches. If a coin is tossed on the figure, what is the probability that the coin will land in the circle, but outside the triangle?

*May 8, 2012*

**geometry**

The coordinates of point A on triangle ABC are (2, -4). What would be the image of point A after triangle ABC is reflected over the y-axis andthen rotated about the origin 180 degree?

*May 5, 2012*

**geometry**

The surface area of a cone is 38 in^2. The radius of a similar cone is triple the radiusof the orginal cone. What is the surface area of the new cone?

*May 5, 2012*

**geometry**

An ice cream server fills a cone, which is 15.7 cm high and 7.2 cm across, with ice cream. She then tops the cone with a nicely rounded half-scoop. On top of this she puts the second scoop. To the nearest cubic centimeter, how much ice cream did you receive?

*May 1, 2012*

**Geometry**

The volume of a cylinder is 250pie cm^3 and the height is 10 cm. Find the circulference of the base to the nearest hundredth of a centimeter.

*May 1, 2012*

**8th grade math**

Each side of a picute is enlarged by 125%. If the original area was 88 square inches, what is the area of the enlarged picture?

*April 12, 2012*

**geometry**

A sphere with a diameter of 24 inches is reshaped into a cone with a radius of 32 inches. If all the material is used, what is the height of the cone?

*April 12, 2012*

**geometry**

A cone with a diameter of 7.2 meters and slant height of 8.8 meters is being filled with water at a rate of 2.5 m^3 per minute. How many minutes will it take to fill the cone?

*April 11, 2012*

**geometry**

A cylindrical tank is being constructed to hold 10,000 ft^3 of water. The diameter of the tank is 36ft. What is the minimum height needed for the tank?

*April 11, 2012*

**geometry**

What is the total surface area of a regular square pyramid with a base side length of 18cm and a height of 12cm?

*April 11, 2012*

**8th grade math**

A cylinder has a cone on top. The base of the cone is congruent to the base of the cylinder. The diameter of the base is 16ft. The height of the cylinder is 16ft. and the height of the cone is 9th. What is the volumeof the entire figure?

*April 10, 2012*

**8th grade math**

You are making a box out of an 11in by 8in piece of poster board by cutting congruent squares out of the four corners and folding up the edges. To the nearest inch, what size square should you use to maximize the volume?

*April 10, 2012*

**8th grade math**

Two towers are similar. The area of the larger tower is 400 pi ft^2 and the area of the smaller tower is 169 pi ft^2. What is the ratio of the heights of the towers?

*April 10, 2012*

**8th grade math**

The dimensions of a rectangular prism are all whole numbers greater than 1". If the volume is 165 cu", and the height is 5", what is the perimeter of the base?

*April 10, 2012*

**8th grade math**

If the formula D(x,y) = (.7x,.7y) is applied to pre-image point (5, -7), what is the image point?

*April 10, 2012*

**geometry**

Large triangle (30¢X, 60¢X, and 90¢X), the base is 15 feet. and small triangle (30¢X, 60¢X, and 90¢X) the above two triangle the ratio of the perimeter of the large triangle to the perimeter of the small triangle is ¡Ô3. Determine the ...

*March 28, 2012*

**geometry**

Large triangle (30¢X, 60¢X, and 90¢X), the base is 15 feet. and small triangle (30¢X, 60¢X, and 90¢X) the above two triangle the ratio of the perimeter of the large triangle to the perimeter of the small triangle is ¡Ô3. Determine the ...

*March 28, 2012*

**geometry**

The volumes of two similar solids are 1331 cubic meters and 27 cubic meters. The surface area of the larger one is 242 square meters. What is the surface area of the smaller one?

*March 27, 2012*

**geometry**

Four metal balls fit snugly inside a cylindrical can. A geometry student claims that two extra balls of the same size can be put into the can, provided all six balls can be melted down and the molten liquid poured into the can. Is the student cottect? Let the radious of balls ...

*March 2, 2012*

**geometry**

A spherical scoop of ice cream has radious 1.25 inches. The scoop is placed on top of a cone with radious of 1 inch and height of 5 inches. Is the cone large enough to hold all the ice cream if it melts? Show your calculations and explain your answer.

*March 2, 2012*

**geometry**

the formula should be s = 2piRH + 2piR^2 I follow your method and find the H = 8. Thanks.

*March 2, 2012*

**geometry**

What is the height of a cylinder with a radius of 6 inches and a surface area of 168pi in^2?

*March 2, 2012*

**geometry**

The Giant Ocean Tank in Boston's New England Aquarium is a cylinder that is 23 feet high and has a volume of 200,000 gallons, (1 gallon = 0.134 ft^3). Find the diameter of the tank.

*March 2, 2012*

**geometry**

A cone has a volume of 36pi cubic meters. Its height is four times its radius. Find the surface area of the cone.

*March 2, 2012*

**Maths**

Domain is X and range is Y. From the equation you can find the y and x.

*February 25, 2012*

**Math 208**

(x + 1)(x + 3) = x^2 + 3x + x + 3 = x^2 + 4x + 3

*February 25, 2012*

**Math**

5x + 4y = 8 x + y = 7 Find x : x = 7 - y 5(7 - y) + 4y = 8 35 - 5y + 4y = 8 -y = 8 - 35 y = 27 x = 7 + 27 x = 34 y = 27 x = 34

*February 25, 2012*

**math problem**

9/10 + 6/25 (you have to find the denominator, the denominator is "50") = 45/50 + 12/50 = 57/50 = 1 7/50

*February 25, 2012*

**maths**

(2X-3)(2X-3) = 4X^2 - 6X - 6X + 9 = 4X^2 - 12X + 9

*February 23, 2012*

**geometry**

thanks

*February 23, 2012*

**geometry**

v = s^3 64 = s^3 s = 4 in SA = 6s^2 = 6 x 4^2 = 1024 in^2 Now I know v = 64 in^3 & SA = 1024 in^3 The ratio is 1024/64 = 16:1 is it right????

*February 23, 2012*

**geometry**

Find the ratio of surface area to volume for a cube with a volume of 64 in^3.

*February 23, 2012*

**geometry**

can I use tha formula is SA = b + 1/2pl?

*February 23, 2012*

**geometry**

The base of a pyramid is a square. The perimeter of the base is 20ft, and the surface area of the pyramid is 65ft^2. Find the slant height of the pyramid.

*February 23, 2012*

**geometry**

Find the lateral area of a right triangular prism with an equilateralbase length of 5cm and height of 10cm.

*February 23, 2012*

**geometry**

The surface area of a right rectangular prism is 112 sq units. The height is twice the width. The length is 4 units more than the height . Find the volume.

*February 22, 2012*

**geometry**

Find the lateral area of a regular hexagonal pyramid with base edge of 10 in and lateral edge of 13 in.

*February 22, 2012*

**geometry**

The surface area and volume of a cube is the same numeric value. Calculate the side length.

*February 22, 2012*

**geometry**

thank you

*February 22, 2012*

**geometry**

The surface area to volume ratio of a cube is 2 to 5. Find the length of each side.

*February 22, 2012*

**probability**

George has a bag of marbles. Inside the bag are 5 red marbles, 3 red marbles, and 2 blue marbles. He draws out two marbles in a row, without replacement. What is the number of outcomes?

*February 22, 2012*

**probability**

There are 12 CD's in a bag -- 6 rap music, 3 country music, and 3 rock music. Two CD's are selected from the bag. The first CD is not replaced before making the second selection. What is the total number of possible out outcomes?

*February 22, 2012*

**Geometry**

a^2 + b^2 = c^2 let a = altitude b = 8 c = 14 a^2 + 8^2 = 14^2 a^2 = 196 - 64 a^2 = 132 a = 11.49

*February 21, 2012*

**8th grade math**

Mr. Rosart selects two students from his class to present their book reports. He places the names of each student in a box and randomly picks one at a time. The class has 14 boys and 12 girls. What is the probability that the second name Mr. Rosart picks is a boy, if the first...

*February 21, 2012*

**8th grade math**

A box contains 5 bags of potato chips, 4 bags of pretzels and 1 bag of corn chips. Andre reaches in the box and randomly picks two bags, one after the other. What is the probability that Andre chooses a bag of potato chips if the first bag was pretzels?

*February 21, 2012*

**8th grade math**

At Maryland Middle School, there are 9 mathematics classes. If two mathematics classes are selected for a school competition, what is the number of possible outcomes?

*February 21, 2012*

**8th grade math**

George has a bag of marbles. Inside the bag are 5 red marbles, 3 green marbles, and 2 blue marbles. He draws out two marbles in a row, without replacement. What is the number of outcomes?

*February 21, 2012*

**algebra**

how soon Sally will get to the mall if she peddles her bike 5 mph for 5 minutes and rides her scooter for 6 minutes at 6 miles an hour!!!!

*February 7, 2012*

**immigrants U.S.A**

Immigrants U.S.A What do you want to know about immigrants to the U.S.A.? Since most of us are descended from immigrants -- who began arriving about four hundred years ago -- that's a lot of time and people. Please clarify your question and we'll try to help you. WICH ...

*April 22, 2007*

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