There are 20 goldfish in a pond. Their population is increasing by 20% each year. The same pond has 100 minnows. The minnow population is increasing by 10 minnows each year. Make a graph to find the year that the two species of fish will have the same population. In what year will the fish populations be approximately the same?
Answer:
13.5 years.
Step-by-step explanation:
We know that exponential growth function is in form [tex]y=a\cdot(1+r)^x[/tex], where, a is initial value and r is growth rate in decimal form.
Population of goldfish after x years would be [tex]y=20\cdot(1+0.20)^x[/tex].
We know that a linear function is in form [tex]y=mx+b[/tex], where, b is initial value and m is slope.
Population of minnow after x years would be [tex]y=100+10x[/tex].
Graphing both equations, we will get our required graph as shown in the attachment.
Since both graphs intersect at [tex]x=13.5[/tex], therefore, in the 13.5 years both populations will approximate the same.
a customer deposits $2000 in a savings account that pays 5.2% interest compounded continuously. how much will be earned between the 3rd and 5th yeards?
Find the area of the triangle that divides the parallelogram in half
1.3 to the second power
What is the answer for # 24?
A B C or D
The volume of the space not filled by the sphere is the difference between the volume of a cube with edge length 6 inches and the volume of a sphere with radius 3 inches.
CubeThe volume of a cube of edge length s is
... V = s³
When the edge length is 6 in, the volume is
... V = (6 in)³ = 216 in³
SphereThe volume of a sphere with radius r is
... V = (4/3)π·r³
When the radius is 3 in, the volume is
... V = (4/3)π·(3 in)³ = 36π in³
SpaceThen the volume of the space between the cube and the sphere is
... Vcube - Vsphere = 216 in³ - 36π in³ ≈ 102.9 in³ . . . . corresponding to choice C
G let x be an exponentially distributed random variable with parameter λ = 1 / 2 . determine the probability distribution function of the random variable y = x 2 . what kind of distribution does y have?
At noon, ship a is 50 km west of ship
b. ship a is sailing south at 10 km/h and ship b is sailing north at 20 km/h. how fast is the distance between the ships changing at 4:00 pm? (round your answer to one decimal place.) 23.05 incorrect: your answer is incorrect. km/h
At 4:00 pm, the distance between the ships is changing at a rate of 30 km/h.
Explanation:To find how fast the distance between the two ships is changing, you can use the Pythagorean theorem, as the two ships are moving at right angles to each other (north and south). Let's denote the distance between the two ships as "D," the speed of ship A as "vA," and the speed of ship B as "vB."
At any given time, you have:
D² = (Distance ship A travels)² + (Distance ship B travels)²
Now, we can differentiate both sides of this equation with respect to time "t" to find how the distance "D" is changing:
2D * dD/dt = 2(vA * dA/dt) + 2(vB * dB/dt)
Here, dD/dt represents the rate of change of the distance between the ships, dA/dt is the speed of ship A (10 km/h), and dB/dt is the speed of ship B (20 km/h).
Plug in the values:
2 * (dD/dt) = 2 * (10 km/h) + 2 * (20 km/h)
Now, solve for dD/dt:
2 * (dD/dt) = 20 km/h + 40 km/h
2 * (dD/dt) = 60 km/h
Now, divide by 2:
dD/dt = 60 km/h / 2 = 30 km/h
So, at 4:00 pm, the distance between the two ships is changing at a rate of 30 km/h.
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in 2010 , a city's population was 55,210 and it was declining at a rate of 1.09% each year. which is the best prediction for when the city's population will first be below 48,000?
Answer: 2023
Step-by-step explanation:
Since, the initial population of the city is 55,210,
And, it is declining at a rate of 1.09%.
Thus, the function that shows the population after x years since 2010 is,
[tex]f(x) = 55210(1-\frac{1.09}{100} )^x[/tex]
[tex]f(x) = 55210(1-0.0109)^x[/tex]
[tex]f(x) = 55210(0.9891)^x[/tex]
If the population of town is 48000 in x years.
⇒ [tex] 55210(0.9891)^x= 48000[/tex]
⇒ [tex] (0.9891)^x= 0.869407715993[/tex]
⇒ [tex]x = 12.769[/tex]
Therefore, after 12.769 years the population of town will be equals to 48,000
⇒ After 12.770 years the population will first be below 48,000.
⇒ After approx 13 years the population will first below 48,000.
⇒ Around 2023 the population will be first below 48,000.
Answer:2022
Step-by-step explanation:
Six girls share 5 pints of milk equally.What fraction of a pint of milk does each girl get?
The manager at Jessica's Furniture Store is trying to figure out how much to charge for a couch that just arrived. The couch was bought at a wholesale price of \$113.00$113.00dollar sign, 113, point, 00, and Jessica's Furniture Store marks up all furniture by 45\%45%45, percent.
At what price should the manager sell the couch?
Answer:
163.85 bucks,bix,backs,boks :P
Step-by-step explanation:
In order to find the retail price, we must first find the amount of markup. Remember that a markup rate is a percentage of the wholesale price that a store adds to get a selling or retail price. With this knowledge, we can figure out the following equation:
markup rate× wholesale price = amount of markup
Since the markup rate is a percentage, we have to convert it into a decimal first. Percent means "out of one hundred," so 45% is equivalent to 45/100 which is also equal to 45 \ 100 so 45/100 = 0.45. 0.45 * 113 = 50.85.
Since the markup rate is a percentage of the wholesale price that is added to get the retail price, we can find the retail price with the following equation:
amount of markup + wholesale price = retail price. 50.85 + 113 = 163.85
What are the zeros of the polynomial function?
f(x)=x^2+9x+20
Enter your answers in the boxes.
Hal wants to make a 2 ½ foot banner from a 5-foot length of cloth. If he has marked 2.0 on the cloth, what does he have to do to find 2 ½ feet?
Suppose f(x) = 0.125x for 0 < x < 4. determine the mean and variance of x. round your answers to 3 decimal places.
The mean of x is 1.35 and the variance of x is approximately 1.267.
Explanation:To find the mean of x, we need to calculate the expected value. We can do this by multiplying each value of x by its corresponding probability and then summing up the results. In this case, using the given values and probabilities, we have 0(0.20) + 1(0.45) + 2(0.20) + 3(0.10) + 4(0.05) = 1.35. Therefore, the mean of x is 1.35.
To find the variance of x, we need to calculate the squared difference between each value of x and the mean, weighted by their respective probabilities. We then sum up these values. Using the formula for variance, we have (0-1.35)²(0.20) + (1-1.35)²(0.45) + (2-1.35)²(0.20) + (3-1.35)²(0.10) + (4-1.35)²(0.05). By simplifying this expression, we find that the variance of x is approximately 1.267.
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Two friends mix blue paint and yellow paint to make batches of green paint, as shown in the tables. Jarrod Cups Blue Cups Yellow 3 2 Ian Cups Blue Cups Yellow 5 2 Which correctly compares their ratios of blue to yellow paint?
Prime numbers have less 1.than two factors.
2.more than two factors. 3.exactly two factors. 4.less than or equal to two factors.
Answer:
They just have 2 factors :/
Step-by-step explanation:
Bc yes
If ab = 8 and a^2+b^2=16, then what is the value of (a+b)^2
how to solve this word problem
In which graph does y vary directly as x? It’s not C, I got it wrong.
Answer:
A
Step-by-step explanation:
A graph where y varies directly as x is a straight line that passes through the origin (0, 0). This is because when two variables vary directly, their ratio is constant, and in the case of y and x, this ratio is the slope of the line.
The equation for direct variation is y = kx, where k is the constant of variation. When we plot this equation on a graph with y on the vertical axis and x on the horizontal axis, we get a straight line that passes through the origin, with a slope of k.
For example, if we have a set of data points that vary directly, such as (1, 2), (2, 4), (3, 6), and so on, we can plot these points on a graph and draw a straight line that passes through the origin and all the points. This line represents the direct variation between y and x, and any other points that satisfy the equation y = kx will lie on this line.
In summary, a graph where y varies directly as x is a straight line that passes through the origin, with a constant slope representing the constant of variation.
What fraction of a gallon is 3 pints?
A high school has 3636 players on the football team. the summary of the players' weights is given in the box plot. approximately, what is the percentage of players weighing greater than or equal to 194194 pounds?
To calculate the percentage of players weighing 194 pounds or more from a box plot, we need to know where 194 pounds falls in relation to the quartiles on the plot. Without the box plot details, we cannot perform the needed analysis.
The student's question appears to concern the analysis of a box plot depicted in their materials to find the percentage of players weighing 194 pounds or more on a football team. However, to accurately answer this question, we need the specific details from the box plot, including the median (Q2), first quartile (Q1), third quartile (Q3), and any outliers if provided. From the box plot, we would determine where the weight of 194 pounds falls in relation to the quartiles. If 194 pounds is at or above Q3, then you would expect a lower percentage of players above this weight; if it is below Q3, then the percentage could be higher.
The approach typically involves identifying the number of players within each quartile and calculating the corresponding percentages. Without the specific box plot data, we cannot perform these calculations. Should you provide the box plot details, we can review the quartiles and calculate the exact percentage of players weighing 194 pounds or more.
what is -6x = -24
13 points
Solve the division problem. Round answer to the nearest hundredth. 9.252.063
The square footage of a house is 1200 square feet. What type of data is this?
Which rule describes a translation that is 8 units to the right and 2 units up?
(x, y) (x - 8, y + 2)
(x, y) (x - 8, y - 2)
(x, y) (x + 8, y - 2)
(x, y) (x + 8, y + 2)
The polynomial 8x2 – 8x + 2 – 5 + x is simplified to 8x2 – gx – h. What are the value of g and h?
g = –9 and h = 7
g = 9 and h = –3
g = –7 and h = 7
g = 7 and h = 3
Answer:
Its D i just took the test
Step-by-step explanation:
Answer:
D. g=7 and h=3
Step-by-step explanation:
A cone has a volume of 12 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of?
6 in3
24 in3
36 in3
48 in3
A person earns 26,800 one year and gets a 5% raise in salary. What is the new salary?
The new yearly salary is $28,140.
Explanation:Amount of raise.
5%=0.05
Multiply the original salary times the percentage of the raise.
$26,800×0.05=$1,340
New salary .
$26,800+1,340=$28,140
HOPE THIS HELPS! :)
This question is based on the concept of percentage. Therefore new salary when there is 5% raise in 26,800 is 28,140. There are many uses of calculating percent.
What is percent ?Percent is a proportionate of a number. Percent is a dimensionless quantity that is it has no unit. Percent is always out of hundred whereas fraction is always from 1. It is represented with the sign %. There are many uses of calculating percent. It is used in calculating interest in bank. It used in calculating inflation rate.
Mathematically,
The new yearly salary of a person is 28,140.
percentage of raise in salary is
5%=0.05
Multiply the original salary and the percentage of the raise in salary
26,800×0.05=1,340
New salary =26,800+1,340=28,140
Therefore new salary when there is 5% raise in 26,800 is 28,140
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A real estate agent knows that he will receive a commission of $4,250 from the sale of a property when the deal is completed 37 days from now. Needing cash today, though, he signs a discount note at a credit union, using his expected commission as the maturity value. The discount rate is 9.55%. Find the effective rate (APR).
6yd 9ft 4in times 2 equals
For a science experiment,Juanita records the height of a plant every day in centimeters.What is the attribute measured in her experiment.
In Juanita's science experiment, the attribute measured is the plant's height, a key phenotypic trait in studying plant growth, which she records in centimeters, using consistent and precise units for scientific reliability.
The attribute measured in Juanita's science experiment is the height of a plant, which is a phenotypic trait important in plant biology. Juanita is collecting data related to plant growth by observing and recording the plant's height in centimeters daily. This meticulous tracking allows for analysis of plant growth patterns over time and the effect of various treatments, such as different fertilizers or amounts of water. The typical unit of measurement for the height of a plant is in centimeters or meters, which are part of the metric system used in scientific research.
During a laboratory experiment like the one Juanita is conducting, it is essential to measure such variables with precision and consistency. Measurements should be recorded using uniform units and methods to ensure reliability in the results, which may include the plant height, recorded in centimeters, at regular intervals. A graph representing this data might portray the number of days since the start of the experiment along the X-axis and the plant's height along the Y-axis, thereby allowing a visual assessment of the plant's growth over time.