Friday

May 6, 2016
Number of results: 117

**science- hydroponics**

the advantage of gravel is that it makes it better to grow plants that you eat? the disadvantage of gravel is that gravel can not hold the plant?
*June 3, 2012 by Celest*

**Science**

A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To test this hypothesis, the student places on goldfish in a bowl with red gravel and another in a bowl with grey gravel. The color of the gravel is the ...
*September 16, 2014 by Gwen*

**Science! Help!**

A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To test this hypothesis, the student places on goldfish in a bowl with red gravel and another in a bowl with grey gravel. The color of the gravel is the ...
*September 16, 2014 by Gwen*

**physics**

Derek the drunk driver drives his car off the road, onto a gravel strip next to the road. Derek does not have anti-lock brakes, so his wheels lock when he enters the gravel area, and the car slides to a halt. Derek's car is traveling at a speed of 20m/s when it enters the ...
*December 15, 2010 by aok*

** math**

A circular pool 2 meters in diameter is in the middle of a 5 meter by 5 meter square of gravel.What is the area actually covered by gravel?
*November 21, 2015 by Tasha*

**maths**

a rectangular plot of grass 25m by 22m has a gravel walk 1.5m wide all around it on the outside.What is the area of the gravel walk?
*February 9, 2013 by dheemanth*

**geometry**

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile.
*February 28, 2012 by Montel*

**Math 20-3**

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
*March 28, 2014 by canadiangoose*

**Math**

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
*March 28, 2014 by Jay*

**algebra**

in a mixture if concrete, there are four lb of cement mix for each pound of gravel. if the the mixture contains a total of 195 lb of these two ingredients, how many pounds of gravel are there?
*July 11, 2010 by Kristina*

**Physics**

A 8800 kg railroad car is rolling at 2.4 m/s when a 3100 kg load of gravel is suddenly dropped in. What is the car's speed (in m/s) just after the gravel is loaded? how do I relate these, I am confused.
*October 26, 2011 by ...*

**math**

Lydia Rise us building a terraium and needs to buy two sizes of gravel and soil to go in the bottom. The terraiun is 24 in longs, 14 in wide, and 15 in tall. A.The bottom layer is pea gravel and needs to be 2 inches deep. How many cubic inches will she need? B. The second ...
*March 11, 2010 by Hobo*

**MATH**

A contractor purchases gravel one cubic yard at a time. (a) A gravel driveway L yards long and 6 yards wide is to be poured to a depth of 1 foot. Find a formula for n(L), the number of cubic yards of gravel the contractor buys, assuming that he buys 12 more cubic yards of ...
*March 13, 2016 by ally*

**physics**

Truck brakes can fail if they get too hot. In some mountainous areas, ramps of loose gravel are constructed to stop runaway trucks that have lost their brakes. The combination of a slight upward slope and a large coefficient of friction in the gravel brings the truck safely to...
*October 31, 2009 by amy*

**Earth Science**

Which particles can wind move most easily? Sand, silt, pebbles, or gravel? I put sand but my teacher marked it wrong. Would it be silt? Pebbles and gravel are pretty heavy.
*December 5, 2007 by Lisa*

**math**

i the conveyor belt takes 54 seconds to move gravel from the bottom of the conveyor belt to the tope at a rate of 3 feet per second, how high does the conveyor belt lift the gravel?
*May 23, 2012 by amanda*

**Geometry**

A rectanglular swimming pool has a length of 25 feet and a width of 12 feet. You want to ass a gravel walkway that is 4 feet wide all the way around the pool. What is the area of the gravel walkway
*April 10, 2016 by Saniya*

**Math**

a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,28,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly covered the graveled ...
*December 20, 2010 by John*

**Math**

a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly covered the graveled ...
*December 16, 2010 by Jimmy*

**Math**

a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly covered the graveled ...
*December 17, 2010 by Gorege*

**Math**

a person cleared a rectangular plot of land and covered it with gravel. then he got 8 square wooden sections of side lengths: 2,5,7,9,16,25,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly covered the graveled ...
*December 18, 2010 by john*

**Algebra**

A batch of concrete is made by mixing 1 part cement, 2.5 parts sand, and 3.5 parts gravel. How many pounds of sand and gravel are needed to make 300 pounds of cement?
*September 22, 2010 by Kimmie*

**Algebra help**

Your cost c to buy w pounds of walnuts at $6/Ib represented by c = 6w A truck originally held 24 chairs. You remove 2 chairs at a time. The number of chairs n remaining after you make t trips is represented by n= 24-2t. The volume V remaining in a 243-ft^3 pile of gravel ...
*November 6, 2014 by Mia*

**math**

a worker in a city park needs to cover a circular path around the outside of a flower garden with gravel. the radius of the garden is 15 feet and the path surrounding the garden is 6 feet wide. how many square feet need to be covered with gravel? explain how you arrived at ...
*March 15, 2010 by Katherine*

**math**

a worker in a city parks need to cover a circular path around the outside of a flower garden with gravel. the radius of the garden is 15 feet and the path surrounding the garden is 6 feet wide. how many square feet need to be covered with gravel? expalin how you arrived at ...
*March 17, 2010 by Katherine*

**math**

At a construction site, 20,000 pounds of gravel are needed to create a driveway with an area of 400 ft2. What area of driveway can be added with another 125 pounds of gravel? 25.5 ft2 312 ft2 160 ft2 2.5 ft2 5 ft2
*September 5, 2014 by haley*

**science-hydrophonics**

the advantage of gravel is : the disadvantage of gravel: the advantage of sand the disadvantage of sand
*June 3, 2012 by Celest*

**Physics**

A truck of mass 9212 kg moving at a speed of 73.2 mph has lost its brakes. Fortunately, the driver finds a runaway lane, a gravel-covered incline that uses friction to stop a truck in such a situation; see the figure. In this case, the incline makes an angle of θ = 39.65...
*February 19, 2011 by Em*

**physics**

A truck of mass 8912 kg moving at a speed of 66.7 mph has lost its brakes. Fortunately, the driver finds a runaway lane, a gravel-covered incline that uses friction to stop a truck in such a situation; see the figure. In this case, the incline makes an angle of θ = 36.75...
*October 5, 2014 by Anonymous*

**algebra**

elmer burns works for a ready-mix concrete cmpany. elmer receives an order for 3.5 cubic yards of concrete. this mixture of concrete contains sand, cement, gravel, and water, for each pound of water, there are 5 lb of sand, 2 lb of cement, and 6 lb of gravel. find (a) the ...
*September 13, 2009 by Anonymous*

** Algebra 1**

You are making up your own mix of concrete to patch a set of stairs. In order to have the proper mix, you need to mix 1 part of Portland cement with 2 parts of sand and 3 parts of gravel. A. How many total parts are in one batch of concrete? B. You make a mix with 4 parts of ...
*October 5, 2013 by KATIE*

**fish tank;; deals with volume. :]**

A cylinder shaped fish talk is 40cm high and has a radius of 12cm. The tank with be layed with a decorative gravel on the bottom. The blue layer will be 2 cm high. The yellow layer will be 3 cm high. And the green layter will be 2cm high. [assume water won't go through the ...
*October 28, 2007 by blah. volume...*

**earth**

what is "lithified gravel"?
*December 9, 2008 by megan*

**science**

what is gravel soil
*September 10, 2009 by smart*

**science**

which is soil better for wind erosion? gravel or humus
*September 8, 2009 by casey*

**calculus**

this is a optimization problem A construction company has been offered a contract for $7.8 million to construct and operate a trucking route for five years to transport ore from a mine site to a smelter. The smelter is located on a major highway, and the mine is 3 km into a ...
*July 25, 2011 by robert*

**physics**

why are you more likely to have an accident on your bicycle if you are riding it on a gravel or wet pathway?how do i explain this using newton's law(s)? thanks consider newtons first law. Then, consider friction on the tire on gravel, wet vs dry pavement. isn't it newton's 3rd...
*June 29, 2007 by Emma*

**science**

would a screen be useful for separating a mixture of gravel and diatomaceous-earth powder?
*March 22, 2011 by ralph*

**engineering**

100 lb of loose gravel can fill a 1-ft^3 box. Its specific gravity is 2.68. What is the dry rodded weight?
*February 5, 2011 by Jazmin*

**science**

which physics principles are employed in stopping a runaway truck in a gravel and sand ramp at the bottom of a mountain?
*May 11, 2008 by sam*

**Science**

How is it possible that the gravel, for example, in a sedimentary rock consists of pieces of both igneous and metamorphic rocks?
*September 25, 2011 by Lola*

**psychology **

If the concept is truck, the prototype might be: A. a Ford pick up. B. bulldozer. C. gravel eighteen wheeler. D. personnel carrier. I think it could be B or D
*August 20, 2013 by nana*

**ENGINEERING**

100 lb of loose gravel can fill a 1-ft^3 box. Its specific gravity is 2.68. What is the dry rodded weight? Find the volume of voids in the preceding problem.
*February 10, 2012 by GSU*

**science**

which is bettter for wind erosion? gravel soil or sandy soil.
*September 8, 2009 by boby*

**Earth Science**

Near shore, larger sand and gravel particles are moved along the ocean bottom by ____. a. deposition b. turbulence c. spits d. density currents
*October 18, 2011 by Leigh*

**GED-Word Problems**

How many cubic feet of gravel will be needed to fill a circular area 14 feet across and 3 inches deep?
*May 13, 2012 by kayla*

**algebra**

In a mixture of concrete, there are four lb of cement mix for each pound of gravel. If the mixture contains a total of 185 lb of these two ingredients, how many pounds of grave are there?
*November 12, 2009 by Sarah*

**maths**

A rectangular grassyplot is 112m long and 78m broad. It has a gravel path 2.5m wide all around it on the inside. Find the area of path and the cost of constructing it at the rate of 1.80 per sq. m .
*December 28, 2012 by Anonymous*

**Maths**

A circular lily pond is surrounded by a gravel walkway that is 4 m wide. Calculate the area of the walkway if the pond is 12 m in diameter.
*August 28, 2014 by Harry*

**Science**

Sand or gravel that naturally forms near Earth's surface is known as A. pollen. B. ore. C. aggregate. (D. bedrock.) When new clay sediment is deposited on top of old beach material, it's known as A. regression. (B. transgression.) C. progression. D. aggression.
*February 10, 2016 by Jocelynn*

**Chemistry**

Name the property that each change depends on. Then classify the property as either chemical or physical. a) You separate a mixture of gravel and road salt by adding water to it b) Carbon dioxide gas freezes at a temperature of -78C
*September 8, 2014 by Jill*

**physics**

A car has a mass of 1500 kg. If the driver applies the brakes while on a gravel road, the maximum friction force that the tires can provide without skidding is about 7000 N. If the car is moving at 18 m/s, what is the shortest distance in which the car can stop safely?
*September 22, 2014 by Josh*

**Math**

If a mixture of 24 lb. of cement, 48 lb. of sand, and 63 lb. of gravel is needed to make 1 cubic foot of concrete, how many pounds of sand are needed to pour a pool deck of 156 cubic feet?
*April 30, 2014 by Rhett cowley*

**Math**

If a mixture of 24 lb. of cement, 48 lb. of sand, and 63 lb. of gravel is needed to make 1 cubic foot of concrete, how many pounds of sand are needed to pour a pool deck of 156 cubic feet? _______pounds
*June 14, 2012 by Leo*

**math**

A circular pond 26 yds in diameter is surrounded by a gravel path 2 yds wide. The path is to be replaced by a brick walk costing $50 per square yard. How much will the walk cost?
*January 12, 2016 by na*

**Physics**

A truck is moving 40 m/s when it encounters a ramp inclined by 30% above the horizontal. Gravel provides a frictional force to slow the truck and has a coefficient of friction(.5). How far along the ramp would the truck travel before coming to a stop?
*December 9, 2012 by Shelby*

**Calc**

Gravel is being dumped from a conveyor belt at a rate of 20 {\rm ft}^3{\rm /min}. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 18 ft high?
*November 16, 2015 by Matt*

**Calc**

Gravel is being dumped from a conveyor belt at a rate of 10 ft^3/min. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 23 feet high?
*October 28, 2010 by Pierre*

**Calculus 1**

Gravel is being dumped from a conveyor belt at a rate of 20 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 7 ft high?
*March 21, 2015 by TayB*

**calc**

Gravel is being dumped from a conveyor belt at a rate of 30 ft3/min. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 21 ft high?
*April 1, 2015 by Anonymous*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its courseness is such that is forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of ...
*March 19, 2016 by Sam*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its coarseness is such that is forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of ...
*March 19, 2016 by Izzy*

**calc**

Gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its coarseness is such that is forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of ...
*March 19, 2016 by Jenny*

**Math**

Mr.Algieri Needs 4 1/2 Yds Of Dirt For A Planting Job. The Gravel Yard Sells A Yard Of Dirt For $ 27.95. How Much Will It Cost Mf. Algieri For The Dirt? If Mr. Algieri Has $ 125.00 To Pay For The Materials, Does He Have Enough Money?
*April 4, 2013 by Zhanise*

**physics**

An open train car, with a mass of 2070 kg, coasts along a horizontal track at the speed 2.31 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 3.25 s at the rate of 491 kg/s. What is the car's speed after the loading is completed?
*November 19, 2012 by Alex*

**related rates calculus 1 **

gravel is being dumped from a conveyor belt at a rate of 15 ft^3/hr and its coarseness is such that it forms a pile in the shape of an inverted right cone whose height is three times its base radius. How fast is the height of the pile increasing when the pile has a height of 10ft
*March 22, 2015 by Ryan kustin*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 6 ft high? (Round your ...
*October 12, 2014 by Breauna*

**calc 1**

Gravel is being dumped from a conveyor belt at a rate of 30 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 14 ft high? (Round your ...
*April 5, 2015 by Dan*

**statistics**

Weights of a certain model of fully loades gravel trucks follow a normal distrbution with mean = 6.4 tons and standard deviation = 0.3 ton. Waht is the probability that a fully loaded truck of this model is a. less than 6 tons? b. more that 7 tons? c. between 6 and 7 tons?
*June 28, 2011 by Harley*

**Mrs. Sue , Reed! Someone!**

the subject is Geologic time. I was wondering if someone could check my answers please Sand or gravel that naturally forms near Earth's surface is known as A. pollen. B. ore. C. aggregate. (D. bedrock.) When new clay sediment is deposited on top of old beach material, it's ...
*February 10, 2016 by Jocelynn*

**calc**

Gravel is being dumped from a conveyor belt at a rate of 30 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 18 feet high?
*November 26, 2011 by crystal *

**Physics**

An open train car, with a mass of 2150 kg, coasts along a horizontal track at the speed 2.29 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 2.67 s at the rate of 441 kg/s. What is the car's speed after the loading is ...
*November 19, 2012 by Kyle*

**calculus**

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 20 feet high?
*October 29, 2009 by Ash*

**calculus **

Gravel is being dumped from a conveyor belt at a rate of 30 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 14 feet high?
*October 18, 2010 by jon*

**calculus **

Gravel is being dumped from a conveyor belt at a rate of 30 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 14 feet high?
*October 18, 2010 by jon*

**Please help Math**

Gravel is being dumped from a conveyor belt at a rate of 20 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 23 feet high?
*March 15, 2009 by Roy*

**calculus**

please help if you can At a sand & gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. The diameter of the base of the cone is approximately three times the altitude. At what rate is the height of the pile changing when ...
*October 14, 2010 by kim*

**calculus word problem**

a conveyor belt pours gravel into a pile at a rate of 20 lbs per minue. the pile is shaped like an upside-down cone. the proportions of the cone are such that when the pile is complete, the diameter of the base is 6 ft and the height is 10 feet. how fast is the height of the ...
*October 21, 2010 by Anonymous*

**math**

i have a 36 in. wide by 18 in. length by 20 in high rectangular aquarium that needs to be filled. i have a 12 in high cylindrical bucket with a 12 in diameter to fill the tank. if the aquarium contains 3 in of gravel and the bucket is to be filled to a depth of 11 in, how many...
*February 20, 2012 by mikey*

**earthquake engineering**

Hey everybody! I have a question I would like to share and ask you. We have a soil layer with medium gravel which has a depth of 38 m. We want to build a multi storey framed building safely with a fundamental period of 1.7 sec.Do you think it will be safe? Vs is given as 750 m...
*March 20, 2015 by lina*

**PreAlgebra**

A circular pond 20 m in diameter is surrounded by a gravel path 5 m wide. The path is to be replaced by a brick walk costing $30 per square meter. How much will the walk cost? i need to teach this to my brother, but i'm stuck on it myself. please show me how this would be ...
*May 8, 2009 by y912f*

**Math**

Gravel is being dumped from a conveyor belt at a rate of 20 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 11 feet high? Recall that ...
*October 15, 2009 by Salman*

**calculus**

Gravel is being dumped from a conveyor belt at a rate of 50 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 24 feet high? Recall that...
*May 14, 2012 by remy*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 18 feet high? (Recall that ...
*October 9, 2013 by Nathan*

**calculus**

Gravel is being dumped from a conveyor belt at a rate of 50 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 12 feet high? ...
*October 26, 2009 by Leonardo*

**calculus**

Gravel is being dumped from a conveyor belt at a rate of cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is feet high? Hint: ...
*November 4, 2012 by Anonymous*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 50 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 14 feet high...
*October 26, 2010 by Carl*

**Calculus Please help!**

Gravel is being dumped from a conveyor belt at a rate of 30 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 24 feet high? Recall that...
*February 28, 2014 by ALI*

**SCIENCE**

Some student made a terratium out ot the bottom of 2-liter soda bottle.They placeed a layer of gravel on the botton of the bottom of the and the added soil.they sprinkled 1/2 teaspoon of grass seed on top of the soil and added two small plants.Finally they waterd the plant and...
*September 10, 2009 by PRECILIA*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 16 feet high? Recall that ...
*July 5, 2013 by Robin*

**Calculus (can someone please verify this?)**

Gravel is being dumped from a conveyor belt at a rate of 30 ft^3/min. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 19 feet high? Vol = (1/3)pi (h^2/4)(h...
*April 12, 2011 by Cecille*

**Calculus (Math 2A)**

Gravel is being dumped from a conveyor belt at a rate of 20 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 19 feet high? Recall ...
*February 19, 2012 by What is wrong with it? *

**math**

Gravel is being dumped from a conveyor belt at a rate of 40 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 22 feet high? Here are ...
*February 27, 2013 by jeremy*

**Chemistry **

Classify each of the following as a heterogeneous mixture (M) or homogeneous mixture (S)or compound (C) or element (E). oxygen dissolved in water - S carbon mixed with sand - M apple juice - S vegetable soup -M sour, curdled milk -M steel -S hydrogen -E salt -E distilled water...
*September 2, 2015 by anonymous*

**Science**

Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly**** Scientists use models of natural systems because they like to use art in science. ...
*October 6, 2015 by Shalee ^~^*

**Science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly.*** Scientists use models of natural systems because they like to use art in science. ...
*August 31, 2015 by Anonymous*

**Science **

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
*October 4, 2015 by Shalee ^~^*

**science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
*October 30, 2013 by anonymous*

**Science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
*October 31, 2013 by thewhat*

**Math**

A certain juice must be mixed at a ratio of 2:60 (2parts powder 60 parts juice). A company need a total of 3 and 1/2 gallons of mixture. How many ounce of each should be added? One more qusetion..... A certain mix of sand is composed of 95 lb (1 sack) of glass, 51 lb of water...
*August 12, 2005 by Kiwi*