Answer:
answer mine i will answer yours
Step-by-step explanation:
Zara travelled in a train moving at an average speed of 120km/h and covered a distance of 40km towards East. 1. Calculate the time taken by the train to cover this distance.
Answer:
0.33 hours or 20 minutes
Step-by-step explanation:
Speed is given as distance divided by time.
That is:
s = d / t
Therefore, time will be:
t = d / s
The train traveled a distance of 40 km at 120 km/h. Therefore, the time taken will be:
t = 40/120 = 0.33 hours or 20 minutes
Organisms A and B start out with the same population size.
Organism A's population doubles every day. After 6 days, the
population stops growing and a virus cuts it in half every day for 4
days.
Organism B's population grows at the same rate but is not infected
with the virus. After 10 days, how much larger is organism B's
population than organism A's population?
Answer:
At the end of ten days, the size of population B is 256 times that of population A
Step-by-step explanation:
We work under the premise that population A and B start both with the same number of individuals. Let's call such initial population [tex]N_0[/tex]
Now, we write the exponential expression that describes population A as a function of days (t) for the first 6 days:
[tex]N_A=N_0\,(2)^t[/tex]
which represents the starting point with [tex]N_0[/tex] individuals on day zero, doubling after one day (t= 1), and keeping on doubling the following days for 6 days.
So at the end of 6 days, population A would have the following number of individuals:
[tex]N_A=N_0\,(2)^6\\N_A=N_0\,(64)\\N_A=64\,N_0[/tex]
That is 64 times the starting number of individuals.
After this, the population stops growing and starts reducing to one-half each day. This behavior can be represented by:
[tex]N_A=64\,N_0\,(\frac{1}{2} )^t[/tex]
therefore after 4 days in this pattern, this culture has the following number of organisms:
[tex]N_A=64\,N_0\,(\frac{1}{2} )^4\\N_A=64\,N_0\,(\frac{1}{16} )\\N_A=4\,N_0[/tex]
which is now just four times what the culture started with.
Now, on the other hand, population B grows doubling each day without interruption, so at the end of 10 days its size is given by:
[tex]N_B=N_0\,(2)^t\\N_B=N_0\,(2)^10\\N_B=N_0\1024\\N_B=1024\,N_0[/tex]
that is it has 1024 times the initial number of organisms.
So if we compare both populations at day 10:
[tex]\frac{N_B}{N_A} =\frac{1024\/N_0}{4\,N_0} =256[/tex]
Therefore, at the end of ten days, population B is 256 times the size of population A
Answer:
After 10 days, population B has grown to be 256 times the size of population A.
Step-by-step explanation:
Line WZ and Line XR are diameters of circle C. The diagram is not drawn to scale. What is the measure of ZWX?
Answer choice:
A) 355
B) 5
C) 292
D) 243
Answer:
d 243
Step-by-step explanation:
finished the test ^^
PLZ ANSWER ASAP 20 POINTSTriangle ABC has AB=18, AC=24, BC=27. Point M is the midpoint of AC, and point N is on segment AB so that BN=2. What is the length of MN? PLZ ANSWER ASAP PLZ 20 POINTS
Answer:
Step-by-step explanation:
Decode the addition or subtraction problem (Change asterisks to digits, to make the operations correct.) 6*5* − *8*4=2856
Answer:
[tex]\left\begin{array}{ccccc}&6&7&5&0\\-&3&8&9&4\\--&--&--&--&--\\=&2&8&5&6\end{array}\right[/tex]
Step-by-step explanation:
[tex]\left\begin{array}{ccccc}&6&*&5&*\\-&*&8&*&4\\--&--&--&--&--\\=&2&8&5&6\end{array}\right[/tex]
10-4=6Therefore the last digit of 6*5* is 0.
[(5-1)+10]-5=98+8+1=176-(1+2)=3Therefore:
[tex]\left\begin{array}{ccccc}&6&7&5&0\\-&3&8&9&4\\--&--&--&--&--\\=&2&8&5&6\end{array}\right[/tex]
A bakery's production is modeled by function f(x), where f(x) is the number of donuts made in a day and x is the number of bags of flour needed. Choose the ordered pair that represents a possible domain and range of the function.
(−1, 15)
(5, 92.75)
(10, 100)
(−5, 110.5)
Which of the following are like radicals? Check all of the boxes that apply.
Answer:
3x√x²y, –12x√x²y, x√yx², 2√x²y.
Step-by-step explanation:
Data obtained from the question include:
3x√x²y, –12x√x²y, –2x√xy², x√yx²,
–x√x²y², 2√x²y
Like radical in this case talks about those havin the same entity in the square root.
With a careful consideration of the data obtained from the question, the like radicals are:
3x√x²y, –12x√x²y, x√yx², 2√x²y.
Like radicals are those whose entities in the square root are the same. So, from the given options like radicals are [tex]3x\sqrt{x^2y}[/tex], [tex]-12\sqrt{x^2y}[/tex], [tex]-12\sqrt{x^2y}[/tex] and [tex]2\sqrt{x^2y}[/tex].
Like radicals are those whose entities in the square root are the same. So, from the given options like radicals are:
A) [tex]3x\sqrt{x^2y}[/tex]
This is like radical with the entity [tex]x^2y[/tex] inside the square root.
B) [tex]-12\sqrt{x^2y}[/tex]
This is like radical with the entity [tex]x^2y[/tex] inside the square root.
C) [tex]-2x\sqrt{xy^2}[/tex]
This is not the like radical with the entity [tex]xy^2[/tex] inside the square root.
D) [tex]-12\sqrt{x^2y}[/tex]
This is like radical with the entity [tex]x^2y[/tex] inside the square root.
E) [tex]-x\sqrt{x^2y^2}[/tex]
This is not the like radical with the entity [tex]x^2y^2[/tex] inside the square root.
F) [tex]2\sqrt{x^2y}[/tex]
This is like radical with the entity [tex]x^2y[/tex] inside the square root.
So, the correct options are A), B), D), and F).
For more information, refer to the link given below:
https://brainly.com/question/16181471
What is the factorization of 729x15 + 1000?
Answer:
A
Step-by-step explanation:
April has only consumed one glass of wine, so her body isn't affected by the alcohol because short-term effects only begin with the second drink. Please select the best answer from the choices provided. T F
ANSWER: False
This is false because alcohol can have effect as soon as the first drink, depending on the type of person you are.
For example, if your parents drank, and you were born early (a preemie) this can affect your ability to drink.
Hope this helps! ^^
Answer:
False
Step-by-step explanation:
Loooook above
Calvin evaluated Negative two-thirds times 5 and one-sixth using the steps below. Step 1: Negative two-thirds time (5 + one-sixth) Step 2: (Negative two-thirds + 5) times (Negative two-thirds + one-sixth) Step 3: 4 and one-third times negative one-half Step 4: Negative 2 and one-sixth Which describes Calvin’s error? In step 1, he incorrectly broke up 5 and one-sixth. In step 2, he distributed the Negative two-thirds instead of the 5. In step 2, he confused the multiplication and addition signs. In step 3, he computed the addition and multiplication incorrectly.
Answer:
In step 2, he confused the multiplication and addition signs
Step-by-step explanation:
Answer:
In step 2, he confused the multiplication and addition signs.
Step-by-step explanation:
What is the value of x? 10 PTS
Answer:
X=4
Step-by-step explanation:
Answer:
x = 4
Step-by-step explanation:
We can find the length of the hypotenuse of the 45 45 90 triangle using the other triangle (which is 30 60 90)
Since the hypotenuse is 8[tex]\sqrt{2}[/tex], the short leg (hypotenuse of other triangle) will be 4[tex]\sqrt{2}[/tex]
This means the value of x must be 4
14. Suppose that 1 out of every 10,000 doctors in a certain region is infected with the SARS virus; in the same region, 20 out of every 100 people in a particular at-risk population also are infected with the virus. A test for the virus gives a positive result in 99% of those who are infected and in 1% of those who are not infected. A randomly selected doctor and a randomly selected person in the at-risk population in this region both test positive for the disease. Who is more likely to actually have the disease?
Answer:
The person in the at-risk population is much more likely to actually have the disease
Step-by-step explanation:
The probability of a randomly selected doctor having the disease is 1 in 1,000 (P(I)=0.0001).
The probability that a doctor is infected with SARS, given that they tested positive is:
[tex]P(I|+)=\frac{P(I)*0.99}{P(I)*0.99+(1-P(I))*0.01}\\P(I|+)=\frac{0.0001*0.99}{0.0001*0.99+(1-0.0001)*0.01}\\P(I|+)=9.9*10^{-3}[/tex]
The probability of a randomly selected person from the at-risk population having the disease is 20 in 100 (P(I)=0.20).
The probability that a person in the at-risk population is infected with SARS, given that they tested positive is:
[tex]P(I|+)=\frac{P(I)*0.99}{P(I)*0.99+(1-P(I))*0.01}\\P(I|+)=\frac{0.2*0.99}{0.2*0.99+(1-0.2)*0.01}\\P(I|+)=0.962[/tex]
Therefore, the person in the at-risk population is much more likely to actually have the disease
Um comerciante comprou uma caixa de um determinado produto, teve um custo fixo com transporte de
R$ 200,00. Venderá cada unidade por R$ 25,00, o lucro final será dado em função das x unidades vendidas. Sabendo que Lucro = venda - custo Responda:
a) Qual é a lei dessa função f?
b) Se o comerciante vender 1 unidade desse produto terá lucro ou prejuízo? c) Se o comerciante vender 10 unidades desse produto terá lucro ou prejuízo?
d) Se o comerciante vender 25 unidades desse produto terá lucro ou prejuízo?
A resposta é B, Não há de quê
Find the HCF of 150 and 180.
Answer:
30 is ans do you know hindi
Answer:
The HCF of 150 and 180 is 30
Hope this helps
Answer 1 of the 2 questions in this picture in the next 5 min I’ll give you a lot of points please and thank you!
Answer:
B=264 b5/34 a576 5739 7985
Reflect shape A in the line x=-1
Coordinates for the shape:
(-3,-2), (-5,-2), (-5,-3), (-4,-3), (-4,-4), (-3,-4)
Answer in in Image.
Reflection of shape:
Reflection is a type of transformation. To reflect an object, you need a mirror line. When a shape is reflected, its size does not change - the image just appears 'flipped'. Every point on the shape is the same distance away on the other side of the mirror line.
Here, After reflection, the reflected shape coordinates are:
(-3,-2), (-5,-2), (-5,-3), (-4,-3), (-4,-4), (-3,-4).
Learn more about reflection of diagrams here:
https://brainly.com/question/12757305?referrer=searchResults
#SPJ2
a group of 50 people were asked their gender and if they liked cats. the data from the survey are shown in the ben diagram. determine the value in the two-way table. a=? b=?
Answer:
A=13, b= 28, c= 6 d=22 e=31
Step-by-step explanation:
E = 15 +16 = 31
6 males like cats ( the middle section) so C = 6
d = 6 +16 = 22
a = 19-6 = 13
b = 50-22 = 28
so in order: a = 13, b = 28, c = 6, d = 22, e = 31
Answer:
A=13
B=28
C=6
D=22
E=31
Step-by-step explanation:
Shelly biked 21 miles in 4 hours. What is shelly's average speak in miles per hour? What is shelly's average speed in miles per hour?
Answer:
5 1/4 mph
Step-by-step explanation:
21 divided by 4= 5 1/4
Answer:
Average Speed = 5.25 mph
Step-by-step explanation:
Given:
Distance = 21 miles
Time = 4 hours
Required:
Average Speed
Formula:
Average Speed = Total Distance Covered / Total Time Taken
Solution:
Average Speed = 21/4
Average Speed = 5.25 mph
7^8 ÷ 7^y = 7^6 Find the value of y
Answer:
[tex]\boxed{\df \ \ \ y = 2 \ \ \ }[/tex]
Step-by-step explanation:
We need to solve the following
[tex]\dfrac{7^8}{7^y}=7^6[/tex]
that we can write
[tex]\dfrac{7^8}{7^y}=7^8*7^{-y}=7^{8-y}=7^6\\<=> 8-y = 6\\<=> y=8-6=2[/tex]
so the answer is 2
Answer:
[tex]y=2[/tex]
Step-by-step explanation:
[tex]7^8 \div 7^y = 7^6[/tex]
Apply the law of exponents.
[tex]7^{8-y}= 7^6[/tex]
Cancel the same bases.
[tex]8-y=6[/tex]
Subtract 8 on both sides.
[tex]-y=6-8[/tex]
[tex]-y=-2[/tex]
Cancel negative signs.
[tex]y=2[/tex]
what is the value of y?
please help !!
find the vertex of this function and decide if it is a maximum or a minimum point.
Answer: maximum point at (-3, 2)
Step-by-step explanation:
The vertex is either the highest or lowest point in the graph. You can see on that graph that the vertex is (-3, 2) because it the x-value -3 points from 0, and the y-value is 2 points from 0. You can also see that the vertex is the highest point on the graph because no points are above it, so it is the maximum value.
Can somebody help me with this ?? :)
Answer: D
Step-by-step explanation:
it shows each points and that they are equal
Please find <TQU in the question above
Answer:
<TQU = 72°
Step-by-step explanation:
<WQT = 60°
=> <WQT = <UYX (corresponding angles)
=> <UYX = <YUV (alternate angles)
=> <YUV = <UQR (corresponding angles)
So, <UQR = 60°
Now,
<PQT+<TQU+<UQR = 180° (angles on a straight line add up to 180°)
48° + <TQU + 60° = 180°
<TQU + 108 = 180
Subtracting 108 from both sides
<TQU = 180-108
<TQU = 72°
David and Eric went out to dinner. Their total bill was $45. They added 20% gratuity to the bill. If they split the bill in half, how much did each person spend?
1) Write an equation/expression for the word problem.
2) How much did each person spend?
Answer:
1)(45x 1.2) /2
2) $27 each
Step-by-step explanation:
Hi, to answer this question we have to multiply the initial bill amount by the gratuity percentage in decimal form (divided by 100)
45 x (20/100) = 45 x 0.2= $9
Now, we have to add the tip amount (9) to the initial bill amount
45+9= $54 (total bill amount with tip)
(We could obtain the same result if we multiply the initial bill amount by 1.2)
Finally, we have to divide the final bill amount by 2:
54/2 = $27 each
1) (45x 1.2) /2
2) $27 each
Feel free to ask for more if needed or if you did not understand something.
Find the area of the circle.
Use 3.14 for pi
Answer:
A =153.86 cm^2
Step-by-step explanation:
The diameter is 14 so the radius is d/2 = 14/2 = 7
A = pi r^2
A = (3.14) (7)^2
A =153.86 cm^2
Answer:
Step-by-step explanation:
First you take the diameter and cut it in half to find the radius. 14/2 = 7
Next you times the radius to the power of 2. 7^2= 49
Then you times your answer by 3.14. 49*3.14 = 153.86
153.86cm² is your answer
What is the y-intercept of the graph below?
Answer:
C
Step-by-step explanation:
The y-intercept is where the line passes through the y-axis
On this graph, we can see this is at the point (0, 2)
Answer:
(0,2)
Step-by-step explanation:
The y intercept is where the graph crosses the y axis ( where x =0)
The graph crosses at y=2
(0,2)
Value discounting refers to the fact that the percieved value of the reinforcer is less the longer you have to wait for it. See your text for review. Consider the perceived value of getting $100.00 today. Then, consider and tell me how valuable $100.00 would be for you if you got the money tomorrow, 30 days from now150 days from now, or 300 days from now. Consider the shape of discounting functions in your text when answering
Answer:
there is an economic principle that states that 1 dollar today is worth more than 1 dollar in the future, since an invested dollar could earn interests and gain value.
For example, we can assume a 6% interest rate (0.5% monthly interest rate), and using the present value formula we can determine the present value of $100:
given to us in 30 days = $100 / (1 + 0.5%)¹ = $99.50given to us in 150 days = $100 / (1 + 0.5%)⁵ = $97.54given to us in 300 days = $100 / (1 + 0.5%)¹⁰ = $95.13In order to calculate the value of $100 given to us tomorrow, we would need to determine a daily interest rate = 6% / 360 = 0.00017
$100 given to us tomorrow = $100 / (1 + 0.00017)¹ = $99.98since the amount of money is not that large and the interest rate is rather low, the difference in value is not that large. But imagine if you used a 24% interest rate instead of 6% (monthly interest rate = 2%)
$100 given to us in 30 days = $100 / (1 + 2%)¹ = $98.04$100 given to us in 150 days = $100 / (1 + 2%)⁵ = $90.57$100 given to us in 300 days = $100 / (1 + 2%)¹⁰ = $82.03as the interest rate increases, the present value decreases.
Some red, white, and blue candies were placed in a bowl. Some contain nuts,
and some do not. Suppose one of the candies were chosen randomly from all
the candies in the bowl. According to the table below, if the candy is blue,
what is the probability that it does not contain any nuts?
Answer:
20%
Step-by-step explanation:
Answer:
40%
Step-by-step explanation:
7/5 x -3/12 + 7/6 + 7/5 x 1/4
Answer:
7/6 or 1.166666667
Step-by-step explanation:
I solved it on calculator
To 1 d.p 1.2
Answer:
7/6
Step-by-step explanation:
7/5 × -3/12 + 7/6 + 7/5 × 1/4
Multiply first.
-21/60 + 7/6 + 7/20
Find the common LCM of the fractions.
-21/60 + 70/60 + 21/60
Add the fractions.
(-21+70+21)/60
-21 and 21 cancels.
70/60
Simplify.
7/6
Maths Question:
The vase has a radius of 5cm,
There are 1000cm cubed of water in the vase,
Work out the depth of the water in the vase.
Give your answer to 1 decimal place.
Answer:
The depth is 12.7 cmStep-by-step explanation:
Let the shape of the vase be a cylindrical shape
the volume of the cylinder is given as
let the depth be h
[tex]v= \pi r^2h[/tex]
Given
radius r= 5 cm
volume v= 1000 cm
height h= ?
Substituting the values we can find the depth(h)
[tex]1000= 3.142*5^2*h\\1000= 3.142*25*h\\\\1000= 78.55*h\\[/tex]
Dividing both sides by 78.55 we have
[tex]h= \frac{1000}{78.55} \\\h= 12.73[/tex]
to 1 dp h= 12.7 cm