It has been observed that a particular plant's growth is directly proportional to time. It measured 2 cm when it arrived at the nursery ang 2.5 cm exactly one week later. If the plant continues to grow at this rate,
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Algebra
the table shows the height of a plant as it grows. which equation in pointslope form gives the plant's height at any time? Time)months) 2 4 6 8 Plant height (cm) 18 36 54 72 a.y+18=9(x+2) b.y18=9x+2 c.y18=9(x2) d.the relationship is nonlinear

math
t varies directly as the square root of l. If l=81, then t=10 what is the constant proportion? 1. a is directly proportional to b. If a = 15, then b = 9 2. M varies directly as n. If n = 2/3, then m = 1/4 3. T varies as the square root of L. If L = 81,

Science
Ruby has observed that plants in her garden vary in height. She wants to investigate whether a plant species (species A) grows faster than the other garden species (species B, C, and D). Select the statement that describes Ruby gathering enough evidence to

science
PLEASE HELP ASAP!!!! Ruby has observed that plants in her garden vary in height. She wants to investigate whether a plant species (species A) grows faster than the other garden species (species B, C, and D). Select the statement that describes Ruby

Algebra 1 Please help
A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: f(n) = 8(1.05)n Part A: When the scientist concluded his study, the height of the plant was

Math
DIRECT VARIATION 1. a is directly proportional to b.If a=15,then b=9 2. m varies directly as n.If n=2/3,then m=1/4 3. T varies as the square root of L. If L=81,then T=10 4.r varies directly as the square of t. If t=16,then r=6. 5. y varies as the cube foot

physicsspeed
i need help with this one thanks A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to: a. sq. root t b. t c. t^2 d.1/sq. root t e. 1/t Work done

8th grade math  Variations
Can you check the following, please? 1. Two minutes after a skydiver opens his parachute, he has descended 1900 feet. After 5 minutes, he descended 4750 feet. If distance varies directly with the time, at what rate is skydiver descending? Ans: to find unit

science
Genetic Factors and Growth Quick Check 1 of 4Items Assessment started: Genetic Factors and Growth Quick Check. Item 1 Ruby has observed that plants in her garden vary in height. She wants to investigate whether a plant species (species A) grows faster than

Physics
I need help on this question: You are given information on the intensity level (which is a measure of the sound intensity) at a point and its distance from the sound source. To make use of this information, you will need to determine the relation between

College Algebra
A sky diver jumps from a reasonable height above the ground. The air resistance she experiences is proportional to her velocity, and the constant of proportionality is 0.23. It can be shown that the downward velocity of the sky diver at time t is given by

Math
One model of Earth's population growth is , where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true?

Physics
A walker's speed, v, is proportional to the ratio of his leg length, L, and the period of the repeating motion of his legs, T, that is, v ∝ L/T. If the period is measured to be proportional to Lp, where p = 3/5, what power of L must the speed be

Physics
1. Which is NOT true about the variables in the relationship F = ma? Acceleration is directly proportional to mass. Force is directly proportional to mass. Force is directly proportional to acceleration. Acceleration will double if force is doubled. An

AP tatistics
A horticulturist wishes to estimate the mean growth of seedlings in a large timber plot last year. A random sample of n = 100 seedlings is selected and the oneyear growth for each is measured. The sample yields = 5.62 cm. The known standard deviation for

biology
jordan is doing a science fair project on the effect of music on the growth of tomatoes. he has two tomato plants, plant A and B, that he grows in a window and gives the same amount of water. plant A is exposed to classical music using headphones attached

biology help please :)
Olga's teacher asked her to design an experiment using freshwater plants, fish bowls, tap water, and salt. After determining an approach, Olga placed a plant in each of three fish bowls. Then, she filled one bowl with fresh water, one bowl with dilute salt

math
If in culture of yeast the rate of growth y'(t) is proportional to the amount y(t ) present at time t, and if y(t) doubles in 1 day, how much can be expected after 3 days at the same rate of the growth? After 1 week (Hint: Continuous growth model)

Math
An electrician charges a $50 fee to make a service call plus $25 per hour he works. Determine whether the relationship between the two variables is proportional. Hours Cost($) 1 75 2 100 3 125 4 150 Is this proportional? Because i am not sure. When i plot

Math
1.A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: f(n) = 12(1.03)n Part A: When the scientist concluded his study, the height of the plant was

Algebra  Can you PLEASE check  I"m stuck!
Bob is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: F(N)=10(1.02)^n 1. Starting from 0 days, plug xvalues into our function to find out how many days it

pls help its due soon!!
Determine if two variables are directly proportional. if so, write the equation of variation. Length measured in centimeters (c) and length measured in inches (i)

Math
This table shows the number of hours Harry spent watching television and the hours he spent doing his homework on three days last week. hours of tv: 1.5 2 3 hours of homework: 2 1.5 1 What kind of relationship do these data appear to have? A. Directly

Algebra
Lynn is tracking the progress of her plant’s growth. Today the plant is 5cm high. The plant grows 1.5 cm each day. Find the height of the plant after 20 days.

science
the growth of a certain plants was measured over a period of more then a month how many centimeters did the plant grow between day 10 and 30 0.5cm 1.0 1.5 2cm** please help me

science
The growth of a certain plant was measured over a period of several days. How many centimeters did the plant grow between day 15 and day 25?

chemistry
According to Avogadro's law, if temperature and pressure are held constant, the volume and number of moles of a gas are directly proportional inversely proportional

mathematics
Determine if two variables are directly proportional. if so, write the equation of variation. Length measured in centimeters (c) and length measured in inches (i).

Math
Growth of Plant Sample A Time (days) Height (in.) 1 6 2 12 3 18 4 24 5 30 Growth of Plant Sample B Time (days) Height (in.) 1 2 2 5 3 10 4 17 5 26 Compare the data for the growth of two plant samples. How can you determine which data set is linear? A)

chemistry
According to Boyle, pressure and volume of a confined gas are ____ proportional, and according to Charles, the volume of a gas at a constant pressure is____ proportional to its Kelvin temperature. A. directly; inversely B. directly; not C. inversely;

math
suppose x and y are inversely proportional. a)if x^p and y^q are also inversely proportional, then how must p and q be related? b)if x^p and y^q are directly proportional, then how must p and q be related? a) i find if you add 1 to p (multiply by x) you

Calculus
"The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. Two streetlights are 40m apart and one is twice as strong as the other. Where

science help check
Which of these is an example of an experiment? plant growth is affected by temperature leaves may change color due to temperature add different quantities of water to three potted plants the plant which gets the most sunlight grows the fastest is it c

math
It has been observed that a particular plant's growth is directly proportional to time. It measured 2 cm when it arrived at the nursery ang 2.5 cm exactly one week later. If the plant continues to grow at this rate, determine the function that represents

math
a student plants a seed, after the speed sprouts the student monitors the growth of the plant by measuring its height every week, the height after each of the first tree wees was 7mm , 20mm, and 33mm, respectively, if this pattern of growth continuesinwhat

Chemistry
I might be overthinking this but my reference books, note and the internet don't have much on this topic. What is the relationship between the solubility product constant Ksp and temperature? A. They are directly proportional B. The two are unrelated C.

Math
Tell if the relationship of a riders height above the first floor and the time since the rider stepped on the elevator or escalator is proportional or nonproportional. Your height, h, in feet above the first floor on the escalator is given by h=0.8t,

Math
Someone please help! Have spent ages stressing over this and still can't figure out how to do it! need asap. Question 3. In ecology, the logistic equation is often written in the form dN divided by dt = rN(1N/K) where N = N(t) stands for the size of the

algebra 117 A
Suppose y is directly proportional to x and that y = 40 when x=5. Complete parts (a)and(b). Find the constant of proportional k. k= (b)use y=ky to find y when x=9 y=

Chemistry
What is he differeence between a graph representing data that are directly proportional and a graph of data that are inversely proportional?

Science
Jordan is doing a science fair project on the effects of music and growth of tomatoes.he has two tomato plants, plant A and plant B that he grows in a window and gives the same amount of water. Plant A is exposed to classical music using headphones

physics
A walker's speed, v, is proportional to the ratio of his leg length, L, and the period of the repeating motion of his legs, T, that is, v ∝ L/T. If the period is measured to be proportional to Lp, where p = 3/4, what power of L must the speed be

Chemistry
A decomposition reaction is found to be first order with respect to the reactant. What is the relationship between the rate and concentration of the reactant? A) The rate is inversely proportional to the square of the concentration B) The rate is inversely

physical science
the wavelength of an electromagnetic wave is ____________. a. directly proportional to its frequency b.inversely proportional to its velocity c. inversely proportional to its frequency d. none of the above

algebra1
M varies directly with n; m=144 when n=8. What is the constant of variation k? I don't know what this mean. Could you help me out in solving this/ A statement such as "M varies directly with n" can be changed to the equation M=kn, where k is a constant.

Science
The fastest growing plant on record is the hesperoyucca whipplei suppose a plant of this type grows 2.5 m in 14 days, what is the growth rate in micrometer per second?

Physics
1.(a) Explain the term time dilation. (b) Show that an interval of time observed in a moving frame of reference will be less than the same interval of the observed in a stationary frame of reference. 2. A rocket was found to be 150m when measured on earth.

chemistry
At 500 K in the presence of a copper surface, ethanol decomposesaccording to the following equation. C2H5OH(g) CH3CHO(g) + H2(g) The pressure of C2H5OH was measured as afunction of time and the following data were obtained. Time (s) PC2H5OH(torr) 0 250.

Mathematics
It has been observed that a particular plant's growth is directly proportional to time. It measured 2 cm when it arrived at the nursery and grows at a rate of .5 cm per week this is represented with the function g(x)= 2+ .5x where x represents the amount

science
Tomato Plant Growth Marissa wanted to see how the amount of water given to tomato plants affected their growth. She had six tomato plants that she split into two groups of three. She watered each plant in group 1 with 300ml of distilled water per day.

Biology
Growth by cell division that makes both ends of a plant longer but not wider is called A secondary growth. B annual ring growth. C vascular growth. D primary growth. is it D? thanks

differential equation
in the theory of learning the rate at which the subject is memorized is assumed to be directly proportional to the amount left to be memorized. also the rate at which the subject is forgotten is directly proportional to the amount memorized in their time

Chemistry
A decomposition reaction if found to be first order with respect to the reactant. What is the relationship between the rate and concentration of the reactant? A) The rate is inversely proportional to the square of the concentration B) The rate is inversely

college math
A quantity, W, is directly proportional to X and the square Y, and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and Z= 6? Give answer to 3 decimal places. Thanks in advance! I appreciate all the

SAT math
Can someone please help me with this question: Write an equation that describes the following variation statement, and then find the constant of proportionality k . z is inversely proportional to x and directly proportional to y ; z = 10 when x = 5 and y

Algebra
x is directly proportional to y and is inversely proportional to the cube of z.

Mathematics
Are the figures below similar? Why or why not?(Use the link below. You cannot directly copy then paste it to another tab, you need to delete the spaces in the link then enter into the website showing the picture to answer this question.) gyazo . com /

Science help please!
1. The relationship between temperature and volume is known as what law? 2. What is the relationship between temperature and pressure? (directly proportional or inversely proportional) 3. The relationship between volume and pressure is known as what law?

university of phoenix
Suppose y is directly proportional to x and that y = 40 when x=5. Complete parts (a)and(b). Find the constant of proportional k. k= (b)use y=ky to find y when x=9 y=

Math
Amalia and Alec are studying the growth of a plant over time. They measure the height of the plant at the end of each week for several weeks and display the data in a scatter plot. They then find the equation for the bestfit line to be y = 2.5 + 1.25x,

Astronomy  help!
Imagine that you have obtained spectra for several galaxies and have measured the observed wavelength of the H emission line of atomic hydrogen. The rest wavelength of H is 656.3 nanometers (nm). Your results are as follows: • Galaxy 1: Observed H

physics
A fundamental law of motion states that the acceleration of an object is directly proportional to the resultant force exerted on the object and inversely proportional to the mass.if the proportionality constant has no dimensions, determine the dimensions

math help please
while on summer vacation with her family mary spends some time at a resort in the mountains there is a lake that rents paddleboats the paddleboat are rented by the hour.mary and her sister Mona decide to rent a paddleboat for 2 hours at the cost of $25.00

science
Rebecca is studying the range of growth of tomato plants. She measured the following data in the fourth week of growing her plants. tomato plant measured growth 1 1.5 cm 2 6.5 cm 3 7 cm 4 6.5 cm 5 3.25 cm 6 7.75 cm 7 5.5 cm 8 6 cm Given this data, what

CHEMISTRY
When we combine the three gas laws into one expression: V is directly proprtional to T P is directly propetional to T > PV is directly proprtional to T P is inversely proportional to 1/V PV/T= constant *******I do not understand how PV is directly

Geography
Growth by cell division that makes both ends of a plant longer but not wider is called A secondary growth. B annual ring growth. C vascular growth. D primary growth. is it D? thanks

Math Ratios
Suppose A is directly proportional to B, B is inversely proportional to C and C is inversely proportional to D. Determine whether A and D are directly proportional, inversely proportional, or neither.

calculus
A tissue culture grows until it has an area of 9 cm^2. A(t) is the area of the tissue at time t. One model for the growth rate is A'(t)=k*sqrt(A(t))*(9A(t)) for some constant k. The number of cells on the edge is proportional to sqrt(A(t)) and most of the

maths
A mixture contains two chemicals, A and B, with masses mA and mB. The total mass of the mixture, m, remains constant. B is converted into A at a rate that is inversely proportional to the mass of A and directly proportional to the square of the mass of B

Physics
How does the electrical force relate to the charge of an object? It is inversely proportional to the square of the charge. It is directly proportional to the square of the charge. It is inversely proportional to the charge. It is directly proportional to

Biology
How does a plant growth regulator differ from a plant growth hormone?

maths PLEASE HELP
A mixture contains two chemicals, A and B, with masses mA and mB. The total mass of the mixture, m, remains constant. B is converted into A at a rate that is inversely proportional to the mass of A and directly proportional to the square of the mass of B

math
which of the following observations would be consistent with an exponential model of population growth? A) The population grew very quickly but then declined. B) The population is observed to increase steadily over time. C) The population is observed to

Chemistry
For my chemistry lab, I reacted Mg powder with HCl to create H2 gas. I measured the volume of H2 gas created by salt water displacement by reading off an inverted test tube. I measured 14.0 mL and calculated the percent yield (used PV=nRT to find

Physics
If you know the frequency of any form of electromagnetic radiation, you can determine its wavelength as for all electromagnetic radiation: Frequency is directly proportional to speed. Frequency is inversely proportional to wavelength. Wavelength is

college math
A quantity, W, is directly proportional to x and the square of y and inversely proportional to the cube of z. W3 when x=4,y=2 and z=4. What is the value of w, when x=5, y=5 and z=4. Give answer to three decimal places. Thanks so much!

PreCalculus
A culture of bacteria obeys the law of unlimited growth. If 500 bacteria are present initially and there are 800 after 1 hour, how many will be present in the cultrue after 5 hours? How long until there are 20,000 bacteria? Hmmm, what is "the law of

Science
During a controlled experiment where you purposely change the temperature of the air in a room and you are measuring the effects on plant growth, what is the dependent variable? I am confused on this. Is the dependent variable plant growth or is the

Cell Biology
1. Which molecule is the major contributor to the increase in mass observed in a full grown plant (i.e. tree) compared to a plant seed? I'm thinking it could be either of these three: Dglucose, C02, or H20.. help?

College math
I really need to know the answer to this extra credit problem. Please help! A quantity, W, is directly proportional to X and the square of Y and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and

Algebra
The growth rate of Plant A is 0.5 inch per month. Plant B grows twice as fast. After how many months x are the plants the same height?

Algebra I
The distance an object falls is directly propotional to the square of the time it has been falling. Afterr 6 seconds it has fallen 1296 feet. How long will it take to fall 2304 feet? I can't even imagine how to figure tis out. I would appreciate your help.

trigonometry
a surveyor 1standing on a highway observed the angle of elevation of the airplain as 22.5°. at the same time, a surveyor 2 observed the angle of elevation of the same airplane to be 30°. if the airplane was 850m directly above a point on the highway,

Maths
The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P=Ae^kt where A and k are constants. With the aid of appropriate examples, explain how

Physics
1.(a) Explain the term time dilation. (b) Show that an interval of time observed in a moving frame of reference will be less than the same interval of the observed in a stationary frame of reference. 2. A rocket was found to be 150m when measured on earth.

Maths B  Population Growth
The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P=¡¼Ae¡½^kt where A and k are constants. With the aid of appropriate examples,

Maths B question  population
The population P of a particular city, Metropia, is growing at a rate proportional to the current population. The population at time t years is modelled by the equation P = Aekt where A and k are constants. (a) With the aid of appropriate examples, explain

Calculus
1) yy'e^x= 0, and y=4 when x=0 means that: A)y=xlnx^2+4 B)y^2=4x^2+3 C)y=2x+1/2x^3 D)y^2=2e^x+14 E)1/2lnx^2+4+6 2) The rate of change of P with respect to t is directly proportional to (10t) and inversely proportional to the cube root of P. The

math
I went through and solved this problem plenty of times...and my answer always comes out to 5/6..however, that's not even one of the choices. One of the choices is 6/5 though... maybe I'm doing somehting wrong 1. Find the missing value. Y is directly

physics
Wave speed of a classical wave, such a wave on the ocean, is ____________ the period of a wave. A. inversely proportional to **** B. directly proportional to C. slower than D. faster than

science
A biochemist used 10.000 grams of P32 in a test on plant growth but forgot to record the date of his experiment. When he measured the amount of phosphorus32 on another day, he found only 1.250 grams of the isotope remaining. If the halflife of P32 is

Math
If y is directly proportional to x and inversely proportional to z^2, by what value is y multiplied if x is doubled and z is multiplied by 3

Science
. Which of these processes would NOT be a part of a scientific investigation of an infectious disease? (Points : 1) cataloguing symptoms forming a hypothesis intentionally infecting people researching the disease 2. In an experiment, 20 pea plant seeds

CHECK PLEASE !!
i think its growth ~ The leaves on a green plant soak up sunlight to make food. A cow's stomach digests grass that was eaten. These are examples of which characteristic of life? A. growth B. homeostasis C. metabolism D. heredity

Algebra
1.What is the domain of this relation? domain range 3 3 2 6 1 0,15 0 6 1 1 Answer 3,2,1,0,1 2. Compare the quantity in Column A with the quantity in Column B Column A slope of y =3 Column B slope of x =3 Answer The two quantities are equal 3.

biology
I am doing a project on the effects of various colors on plant growth. I have a part on my project that says I have to write about the lights, and plant table used. I am lost, does anyone know what might refer to? Please help

Physics
The heat in unit H produced by a battery current is directly proportional to time t and the square of the voltage v and inversely as the resistance R ,when H=120, t=2 v=24, R=80 (I) what is the law connecting the variable (ii) calculate H when t= 3/2 v=120

physics help
The magnitude of the velocity of a particle which starts from rest 2 ft below the origin when t = 0 and moves along a vertical axis is directly proportional to the time after starting. The displacement of the particle during the time interval from t = 1

physics help
The magnitude of the velocity of a particle which starts from rest 2 ft below the origin when t = 0 and moves along a vertical axis is directly proportional to the time after starting. The displacement of the particle during the time interval from t = 1

math
three students took part in an afterschool science club. Each student planted a sunflower and observed its growth over time. The graph below shows this data. Create a table that represents the x and y values of the graph. How has each student's sunflower