Answer:
8.9 meters
Step-by-step explanation:
this seems like a problem where you can use the pythagorean theorem:
you know one of the two legs (6m) and the hypotenuse (9m), you must find the other leg
a^2 + 6^2 = 9^2
a^2 + 36 = 81
a^2 = 45
a = [tex]\sqrt{45}[/tex] or [tex]\sqrt{9}[/tex] · [tex]\sqrt{5}[/tex] which simplifies to be 3[tex]\sqrt{5}[/tex] or approx. 8.9 meters
HELP PLZ Which confidence level would produce the widest interval when estimating
the mean of a population based on the mean and standard deviation of a
sample of that population?
69% 42% 57% 83%
Answer:
D
Step-by-step explanation:
Just took the quiz
The confidence interval that would produce the widest interval when estimating the mean of a population should be 83%.
What is a confidence interval?It refers to the range of values where the sample should be watched also in this the value should be determined that correctly represent the population.
Also, the more the confidence interval the more should be the widest interval.
Therefore, the last option is correct.
Learn more about confidence here: https://brainly.com/question/14634922
In a research lab, a cell biologist is growing a strain of bacteria under two different conditions. Culture A had an initial population of 200 and doubles every hour. Culture B had an initial population of 819200 but has been contaminated. Its population is now decreasing by half every hour. When will the two cultures have an equivalent population? Solve using an exponential equation.
Answer:
They will have the same population after 6 hours
Step-by-step explanation:
The general exponential equation format for this is;
P = P_o(e^(kt))
For Culture A, we are told that it had an initial population of 200 and doubles every hour.
Thus;
After 1 hour, P = 400
After 2 hours, P = 800
After 3 hours, P = 1600
Thus;
At t = 1, we have;
400 = 200(e^(k × 1))
400/200 = e^(k)
e^(k) = 2 - - - (eq 1)
At t = 2, we have;
800 = 200(e^(k × 2))
800/200 = e^(2k)
e^(2k) = 4 - - - (eq 2)
To find k, let's divide eq 1 by eq 2.
(e^(2k))/e^(k) = 4/2
e^(2k - k) = 2
e^(k) = 2
k = In 2
k = 0.6931
Thus;
P = 200e^(0.6931t)
For Culture B, we are told that it had an initial population of 819200 but has been contaminated. Its population is now decreasing by half every hour.
Thus;
After 1 hour, P = 409600
After 2 hours, P = 204800
After 3 hours, P = 102400
Thus;
At t = 1, we have;
409600 = 819200(e^(k × 1))
409600/819200 = e^(k)
e^(k) = 0.5 - - - (eq 1)
At t = 2, we have;
204800 = 819200(e^(k × 2))
204800/819200 = e^(2k)
e^(2k) = 0.25 - - - (eq 2)
To find k, let's divide eq 1 by eq 2.
(e^(2k))/e^(k) = 0.25/0.5
e^(k) = 0.5
k = In 0.5
k = -0.6931
Thus;
P = 819200(e^(-0.6931t))
We want to find the time when the 2 cultures will have the same population. Thus;
200e^(0.6931t) = 819200(e^(-0.6931t))
Arranging, we have;
(e^(0.6931t))/(e^(-0.6931t)) = 819200/200
e^(0.6931t - (-0.6931t) = 4096
e^(1.3862t) = 4096
1.3862t = In 4096
1.3862t = 8.3178
t = 8.3178/1.3862
t ≈ 6 hours
B
С
Move vertex D and observe how the measures change.
Make a conjecture. Which of the following statements appear to be
true? Check all that apply.
VX
AC and BD are always equal.
AE and CE are always equal.
BE and DE are always equal.
AC and BD always bisect each other.
AC and BD are always perpendicular
A
D
AE = 40 units
CE = 40 units
BE = 32 units
DE = 32 units
Check
Intro
Answer:
Step-by-step explanation:
it’s B,C,D
Which equation represents the standard form for linear equations?
A y= 5x – 2
B. 3x – 5 = 2y
C. 1/2x+ 2y = 7
D. 5x– 4y = 20
Answer:
Ax + By = C the answer is C 1/2x+2y=7
Step-by-step explanation:
Solve the inequality: I will give brainliest. Explain in detail please!
p/8 ≥ -5
A.) p ≥ 40
B.) p ≥ 40
C.) p ≥ -13
D.) p ≥ -40
Answer:
plz give me BRAINLIEST
Step-by-step explanation:
c. p >-13
Find the slope between the points (6,10) and (4, -2)
Answer:
The slope is 6/1 or 6
Step-by-step explanation:
evaluate the limit of
[tex] \sqrt{x - 1} [/tex]
approaches to
[tex] {1}^{ - } [/tex]
Answer:
sorry homie im bad at math but download conects
Step-by-step explanation:
i just cheat my way through life
What is the value of x for the equation 4x – 2y = 6 if y= -3?
Answer:
x = 0
Step-by-step explanation:
Let's divid both sides of the equation by 2 first, so we don't have as much work to do in the next step:
[tex]4x-2y=6\\2x-y=3[/tex]
Substituting -3 for y:
[tex]2x-(-3)=3\\2x+3=3\\2x=0\\x=0[/tex]
one band was paid $14000 for a concert
Answer:
cool, but what is the question?
hey, help me ASAP please :)
Answer:
because of vertical angles, 108
Step-by-step explanation:
Answer:
108 degrees
Step-by-step explanation:
Opposite angles are equal.
Thus, x = 108 degrees.
A team is ordering sweatshirts and sweatpants for its players. Each sweatshirt costs $34 and each pair of sweatpants costs $15. Write an algebraic expression to represent the total cost if want sweatshirts and y players want sweatpants.
Answer:
34+15y
Step-by-step explanation:
Let x players want a sweatshirt and y players want sweatpants.
Each sweatshirt costs $34 and each pair of sweatpants costs $15.
Cost of sweatshirt = 34x
Cost of sweatpants = 15y
Total cost = cost of sweatshirt + cost of sweatpants
= 34x+15y
Hence, the total cost is "34x+15y".
The surface area of the pyramid is
square inches.
fill in the blank
Answer:
9360 square inches
Step-by-step explanation:
A line passes through the point 2,1 and has a slope of -3/5. Write an equation for this line
Answer:
y = -3/5x + 1.3
Step-by-step explanation:
y = mx + b
m: slope
b: y-intercept
First, let's substitute in the values.
Point: (2, 1)
Slope: -3/5
y = mx + b
(1) = (-3/5)(2) + b
1 = -0.3 + b
1 + 0.3 = -0.3 + b + 0.3
b = 1.3
Now, let's add the slope and y-intercept to the equation.
y = mx + b
m = -3/5
b = 1.3
y = -3/5x + 1.3
Hope this helped! <3
what is beter,
10 Pens for $8.99.
or
25 Pens for $19.75.
Answer:
the 2 one is better because you get more pens
Step-by-step explanation:
you get more pens
6. What is the smallest whole number that is a solution to 3x > 21?
A6
B. 7
C. 8
D.9
Answer:
probs c
Step-by-step explanation:
c bc 3x>21 is x>7
the smallest whole number out of the multiple choice answer that fits into the solution is 8
Answer:
C. 8
Step-by-step explanation:
To answer you must first solve the inequality, do this by dividing both sides by 3. [tex]\frac{3x}{3} > \frac{21}{3}[/tex], which simplifies to x > 7. This means that x must be greater than 7 without being 7 because the inequality does not use the "or equal to" sign. Therefore, 8 must be the correct answer because it is the smallest whole number that is larger than 7.
2:4:2 in simplest form ratio
Answer: 1 : 2 : 2
Step-by-step explanation:
2 : 4 : 2 divided by 2 is 1 : 2 : 2 so they're equivalent.
Can someone please help me and thank you
9514 1404 393
Answer:
325 cm³
Step-by-step explanation:
The volume is the product of the dimensions shown.
V = LWH
V = (13 cm)(5 cm)(5 cm) = 325 cm³
PLEASE HELP ME I AM SO CONFUSED!!
Tommy thought of a number. He multiplied the number 4, then added six. The result was fifty. What was Tommy's starting number?
Answer:
Was number 11
Step-by-step explanation:
50 - 6 = 44
44 dividid 4 is 11
Lori tosses a ball into the air. The equation y = –16(x – 1)^2 + 25 models the height, y, in feet, of the ball after x seconds. What is the maximum height the ball reaches?
1 ft
9 ft
16 ft
25 ft
Answer:
25 ft
Step-by-step explanation:
Got it right on EDG2020
The ball will reach the maximum height in a second. Then the maximum height the ball reaches will be 25 ft.
What is differentiation?The rate of change of a function with respect to the variable is called differentiation. It can be increasing or decreasing.
Lori tosses a ball into the air. The equation models the height, y, in feet, of the ball after x seconds.
[tex]\rm y = -16(x - 1)^2 + 25[/tex]
Differentiate the equation with respect to x, then we have
[tex]\begin{aligned} y' &= 0\\\\\dfrac{d}{dx}[-16(x - 1)^2 + 25] &= 0\\\\ -32(x-1) &= 0\\\\x &= 1 \end{aligned}[/tex]
Then the maximum height the ball reaches will be
[tex]\rm y = -16(1 - 1)^2 + 25\\\\y = -16*0^2 + 25\\\\y = 25[/tex]
Then the maximum height the ball reaches will be 25 ft.
More about the differentiation link is given below.
https://brainly.com/question/24062595
#SPJ2
enter a negative number that is greater than -10
Answer:
-9
Step-by-step explanation:
Can I have brainliest?
Also can you please thank me, it'll be gratefully appreciative.
:)
what’s the answer
r+11+ Br= 29
r= 18/1+b
B= -1 + 18/r
Each square on a grid represents one unit on each side.
Calculate the slope of graph D. Explain or show your reasoning.
Answer:
Slope = -4
Step-by-step explanation:
The slope is negative because the line is going down.
The line goes down 4 times and goes right once = 4
The required slope of the given graph would be - 4 which is a negative slope.
What is a graph?A graph can be defined as a pictorial representation or a diagram that represents data or values.
The graph is given in the question
Each square on a grid represents one unit on each side.
We have to determine the slope of the given graph D
According to the given graph, we take two points (4, 12) and (7, 0)
The slope of a line is defined as the gradient of the line.
It is denoted by m
Slope m = (y₂ - y₁)/(x₂ -x₁ )
Consider two points on a line—Point 1 and Point 2. Point 1 has coordinates (x₁,y₁) and Point 2 has coordinates (x₂, y₂)
Slope m = (0 - 12)/(7 -3 )
Slope m = -12/3
Slope m = -4
Thus, the required slope of the given graph would be - 4
Learn more about the Slope of the Line here:
brainly.com/question/14511992
#SPJ2
4. Bikes A and B are traveling on perpendicular roads. At the same time, bike A is
leaving the intersection at a rate of 2 feet per second and bike B is leaving the
intersection at 3 feet per second. How fast is the distance, in feet per second between
them changing after 5 seconds?
Answer:
[tex]\sqrt{13}[/tex]
The rate of change of distance between two cars at the given time is required.
The required rate of change is [tex]\sqrt{13}[/tex] feet/s
Rate of changea = Distance covered in 5 s by bike A = [tex]2\times 5=10\ \text{feet}[/tex]
b = Distance covered in 5 s by bike B = [tex]3\times 5=15\ \text{feet}[/tex]
c = Distance between A and B in 5 s = [tex]\sqrt{10^2+15^2}=5\sqrt{13}\ \text{feet}[/tex]
Applying Pythagoras theorem
[tex]a^2+b^2=c^2[/tex]
Differentiating with respect to time
[tex]2a\dfrac{da}{dt}+2b\dfrac{db}{dt}=2c\dfrac{dc}{dt}\\\Rightarrow \dfrac{dc}{dt}=\dfrac{a\dfrac{da}{dt}+b\dfrac{db}{dt}}{c}\\\Rightarrow \dfrac{dc}{dt}=\dfrac{10\times 2+15\times 3}{5\sqrt{13}}\\\Rightarrow \dfrac{dc}{dt}=\sqrt{13}\ \text{feet/s}[/tex]
Learn more about rate of change:
https://brainly.com/question/8728504
What is 70 percent of30
Regi has £9 in her purse.
She spends a £5 note and gets £3 back in change.
How much is in Regi's purse now?
Answer:
7 hope this helps
Step-by-step explanation:
9 - 5 = 4 + 3 = 7
given a-2b=8, 4a+3b= 21; prove b= -1
please give a step by step answer
For the system of the equation given we have proven that b = -1.
Given that,
a - 2b = 8
4a + 3b = 21
To prove b= -1
The equation is the relationship between variables and is represented as y =ax +b is an example of a polynomial equation.
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
a - 2b = 8 - - - - - - - (1)
4a + 3b= 21 - - - -- - - (2)
From equation 1
a = 8 + 2b
put a in equation 2
4 (8 + 2b) + 3b = 21
32 + 8b + 3b = 21
11b = 21 - 32
11b = -11
b = -1
Hence proved.
Thus, for the system of the equation given, we have proven that b = -1.
Learn more about the equation here:
brainly.com/question/10413253
#SPJ2
The circle shown has a radius of 12 mm
12 mm
What is the circumference of the circle?
A. 6 mm
B. 12 mm
C. 24 mm
D. 362 mm
Please help me with this homework
Answer:
linear
non-linear
Step-by-step explanation:
Answers
A. 10
B. 5
D. 15
C. 20
Answer:
D: 15
Step-by-step explanation:
Ok, by looking at the first equation, you know that one triangle equals 10. By looking at the second one, you see that two circles equal 10, since 20- triangle(10) equals 10. This means a circle has to equal 5. looking at the third one, the answer is 13, and a circle is 5, so 13-5=8. Two squares equal 8. the last one shows one triangle, one circle, and a half square. From the third one, you know that one square equals 4, so a half square equals two. I do not know why this logic doesn't match with the answers, since 10(triangle) plus 5(circle) and 2(half square) is 17, but in terms of what makes sense and just matching it with the answers provided, I say go with the third option.