Answer:
time and weather data is dis right
Step-by-step explanation:
Step-by-step explanation:
Weather forecasting is the application of science and technology to predict the conditions of the atmosphere for a given location and time. People have attempted to predict the weather informally for millennia and formally since the 19th century. Weather forecasts are made by collecting quantitative data about the current state of the atmosphere at a given place and using meteorology to project how the atmosphere will change.
Once calculated by hand based mainly upon changes in barometric pressure, current weather conditions, and sky condition or cloud cover, weather forecasting now relies on computer-based models that take many atmospheric factors into account.[1] Human input is still required to pick the best possible forecast model to base the forecast upon, which involves pattern recognition skills, teleconnections, knowledge of model performance, and knowledge of model biases. The inaccuracy of forecasting is due to the chaotic nature of the atmosphere, the massive computational power required to solve the equations that describe the atmosphere, the error involved in measuring the initial conditions, and an incomplete understanding of atmospheric processes. Hence, forecasts become less accurate as the difference between current time and the time for which the forecast is being made (the range of the forecast) increases. The use of ensembles and model consensus help narrow the error and pick the most likely outcome.
There is a vast variety of end uses to weather forecasts. Weather warnings are important forecasts because they are used to protect life and property. Forecasts based on temperature and precipitation are important to agriculture, and therefore to traders within commodity markets. Temperature forecasts are used by utility companies to estimate demand over coming days. On an everyday basis, many use weather forecasts to determine what to wear on a given day. Since outdoor activities are severely curtailed by heavy rain, snow and wind chill, forecasts can be used to plan activities around these events, and to plan ahead and survive them. In 2009, the US spent approximately $5.1 billion on weather forecasting.[2]
History
PLEASE HELP 25 points with brainiest and 5 stars and thanks
Answer:
1/4
Step-by-step explanation:
3 red + 6 green = 9 total
P( red) = red/total = 3/9 = 1/3
Now we don't put it back
2 red + 6 green = 8 total
P( green) = green/total = 6/8 = 3/4
P (red, keep,green) = 1/3 * 3/4 = 1/4
Answer:
[tex]\Large \boxed{{\frac{1}{4} }}[/tex]
Step-by-step explanation:
There are 3 red clips and 6 green clips.
Total clips = 3 + 6 = 9
The probability of picking a red clip is 3/9 = 1/3.
You don’t put the red clip back.
Now there are 2 red clips and 6 green clips.
Total clips = 2 + 6 = 8
The probability of picking a green clip is 6/8 = 3/4
P(pulling out a red clip and then a green clip) = 1/3 × 3/4 = 3/12 = 1/4
consider 8x^2-48x=-104 factor the trinomial and simplify
(x+_)^2=_
Answer:
[tex](x-3-2i)(x-3+2i)[/tex]
Steps:
[tex]8x^2-48x=-104[/tex]
[tex]8x^2-48x+104=0[/tex]
Divide both sides by 8
[tex]x^2-6x+13=0[/tex]
But we can't factor it.
Using the Quadratic Formula to calculate the roots:
[tex]$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$[/tex]
[tex]$x=\frac{-(-48)\pm \sqrt{(-48)^2-4\cdot 8\cdot 104}}{2\cdot 8}$[/tex]
[tex]$x=\frac{48\pm32i}{16}$[/tex]
[tex]x_1=3+2i\\x_2=3-2i[/tex]
The answer might be
[tex](x-(3+2i))(x-(3-2i))[/tex]
[tex](x-3-2i)(x-3+2i)[/tex]
Need help Giving 13 points
Answer:
Read Exp:
Step-by-step explanation:
1.) 4 is the Base and 8 is the Exponent.
2.) 9^4 = 9 x 9 x 9 x 9 = 6561.
3.) (-5)^2 = -5 x -5 = 25.
4.) 3^3 = 3 x 3 x 3 = 27.
5.) (1/2)^5 = 1/2 x 1/2 x 1/2 x 1/2 x 1/2 = 0.03125
Have to change it to a simplified fraction:
* 1/32
What type of number is -4pi
A) whole number
B) Integer
C) Rational
D) Irrational
Answer: D
Step-by-step explanation:
Irrational numbers cannot be expressed as a ratio of two integers.
Answer:
D only
Step-by-step explanation:
Multiply (3)(-4)(2)
1. -48
2. -24
3. 24
4. 48
The time required to cook a pizza at a neighborhood pizza joint is normally distributed with a mean of 12 minutes and a standard deviation of 2 minutes. Find the time for each event.
Answer:
(a) the time for the event of the highest 5% is 15.29 minutes.
(b) the time for the event of the lowest 50% is 12 minutes.
(c) the time for the event of the middle 95% is 8.08 minutes and 15.92 minutes.
(d) the time for the event of the lowest 80% is 13.68 minutes.
Step-by-step explanation:
We are given that the time required to cook a pizza at a neighborhood pizza joint is normally distributed with a mean of 12 minutes and a standard deviation of 2 minutes.
Let X = the time required to cook a pizza at a neighborhood pizza joint.
The z-score probability distribution for the normal distribution is given by;
Z = [tex]\frac{X-\mu}{\sigma}[/tex] ~ N(0,1)
where, [tex]\mu[/tex] = mean time = 12 minutes
[tex]\sigma[/tex] = standard deviation = 2 minutes
(a) We have to find the time for the event of the highest 5%, that means;
P(X > x) = 0.05 {where x is the required time}
P( [tex]\frac{X-\mu}{\sigma}[/tex] > [tex]\frac{x-12}{2}[/tex] ) = 0.05
P(Z > [tex]\frac{x-12}{2}[/tex] ) = 0.05
Now, in the z table, the critical value of x that represents the top 5% of the area is given as 1.645, i.e;
[tex]\frac{x-12}{2}=1.645[/tex]
[tex]{x-12}=1.645\times 2[/tex]
x = 12 + 3.29 = 15.29 minutes.
Hence, the time for the event of the highest 5% is 15.29 minutes.
(b) We have to find the time for the event of the lowest 50%, that means;
P(X < x) = 0.50 {where x is the required time}
P( [tex]\frac{X-\mu}{\sigma}[/tex] < [tex]\frac{x-12}{2}[/tex] ) = 0.50
P(Z < [tex]\frac{x-12}{2}[/tex] ) = 0.50
Now, in the z table, the critical value of x that represents the lowest 50% of the area is given as 0, i.e;
[tex]\frac{x-12}{2}=0[/tex]
[tex]{x-12}=0[/tex]
x = 12 + 0 = 12 minutes.
Hence, the time for the event of the lowest 50% is 12 minutes.
(c) We have to find the time for the event of the middle 95%, that means we have to find the time for the event of 2.5% and above 97.5%;
Firstly, the time for the event of the lowest 2.5%, i.e;
P(X < x) = 0.025 {where x is the required time}
P( [tex]\frac{X-\mu}{\sigma}[/tex] < [tex]\frac{x-12}{2}[/tex] ) = 0.025
P(Z < [tex]\frac{x-12}{2}[/tex] ) = 0.025
Now, in the z table, the critical value of x that represents the lowest 2.5% of the area is given as -1.96, i.e;
[tex]\frac{x-12}{2}=-1.96[/tex]
[tex]{x-12}=-1.96 \times 2[/tex]
x = 12 - 3.92 = 8.08 minutes.
Firstly, the time for the event of the below 97.5%, i.e;
P(X < x) = 0.975 {where x is the required time}
P( [tex]\frac{X-\mu}{\sigma}[/tex] < [tex]\frac{x-12}{2}[/tex] ) = 0.975
P(Z < [tex]\frac{x-12}{2}[/tex] ) = 0.975
Now, in the z table, the critical value of x that represents the top 2.5% of the area is given as 1.96, i.e;
[tex]\frac{x-12}{2}=1.96[/tex]
[tex]{x-12}=1.96 \times 2[/tex]
x = 12 + 3.92 = 15.92 minutes.
Hence, the time for the event of the middle 95% is 8.08 minutes and 15.92 minutes.
(d) We have to find the time for the event of the lowest 80%, that means;
P(X < x) = 0.80 {where x is the required time}
P( [tex]\frac{X-\mu}{\sigma}[/tex] < [tex]\frac{x-12}{2}[/tex] ) = 0.80
P(Z < [tex]\frac{x-12}{2}[/tex] ) = 0.80
Now, in the z table, the critical value of x that represents the lowest 80% of the area is given as 0.8416, i.e;
[tex]\frac{x-12}{2}=0.8416[/tex]
[tex]{x-12}=0.8416 \times 2[/tex]
x = 12 + 1.68 = 13.68 minutes.
Hence, the time for the event of the lowest 80% is 13.68 minutes.
Gwen says that the sum of -1 3/4 and 2 1/2 is the same as the difference between 2 1/2 and 1 3/4. Is Gwen correct? Explain why or why not.
Answer: No
Step-by-step explanation: no because one is negative 1 3/4 and the other one isint in the negatives
The sum of -1 3/4 and 2 1/2 is the same as the difference between 2 1/2 and 1 3/4 by cumulative property.
What is summation?A summation, also abbreviated as a sum, is the outcome of adding two or more numbers or quantities. Here are always an integer number of terms in a summation. There are summations with an infinite set of parameters.
The summation is to add or subtract any two or more terms by doing that operation we will get a new result which could be big or small depending upon the number.
Cumulative property is the property summation states;
x + y will be equal to y + x ⇒ x +y = y + x
Now given,
The sum of -1 3/4 and 2 1/2 ⇒ -1 3/4 + 2 1/2
By cumulative property,
-1 3/4 + 2 1/2 = 2 1/2 + -1 3/4
The difference between 2 1/2 and 1 3/4 ⇒ 2 1/2 - 1 3/4
Hence "The sum of -1 3/4 and 2 1/2 is the same as the difference between 2 1/2 and 1 3/4 by cumulative property".
For more information about summation,
brainly.com/question/10777222
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17.Two pipes A and B can fill an empty tank in 3hrs and 5hrs respectively. Pipe C can empty the full tank in 6 hours. If the three pipes A, B, and C are opened at the same time, find how long it will take for the tank to be full. *
3 points
Answer:
It will take 11/30(cistern/hour) for the tank to be full
zoey inflates 24 balloons for decorations at the middle school dance. if zoey inflated 15% of the total number of balloons for the dance, how many balloons are there total?
Answer:
160 balloons
Step-by-step explanation:
Step 1: State what is known
She blew up 24 balloons
She only inflated 15%
We want to find the total amount of balloons
Let the total balloons equal "x"
Step 2: Write you equation
[tex]0.15x=24\\\frac{0.15x}{0.15} =\frac{24}{0.15} \\x = 160[/tex]
Therefore there are 160 balloons in total
help me out here pleaseee
Answer:
Wednesday: 45 - 18
Thursday: 55 - 22
Step-by-step explanation:
18*2.5=45
55/5=11
11*2=22
Answer:
Trees Planted Unknown Value = 45
Trees Harvested Unknown Value = 22
Step-by-step explanation:
Plants : Harvest
= 5 : 2
= x : 18
= 5 * x : 2 * x
= 5 * x : 18 / 2
= 5 * x : 9
= 5 * x : x
= 5 * x : 2 * x
= 5 * 9 : 2 * 9
= 45 : 18
Trees planted value = 45
Plants : Harvest
= 5 : 2
= 55 : y
= 5 * y : 2 * y
= 55 / 5 : 2 * y
= 11 : 2 * y
= y : 2 * y
= 5 * y : 2 * y
= 5 * 11 : 2 * 11
= 55 : 22
Trees harvested value = 22
I really hope this helps! Tell me if I am incorrect!
Which of the following is equal to 393,500? 3.935 × 10 -5 3.935 × 10 5 0.3935 × 10 -6 39.35 × 10 -4
Answer:
3.935 x 10^5.
Step-by-step explanation:
There are five digits after the first 3 so it will be 10^5.
The answer is 3.935 x 10^5.
393500 equals 3.935×10⁵
What is an exponent?If we write xⁿ then we mean to say that x is multiplied n times.
The exponent of a number says how many times the number is multiplied by itself.
How to calculate?393500=3.935×100,000=3.935×10⁵
Hence, 393500=3.935×10⁵
Learn more about exponents here- https://brainly.com/question/5497425?referrer=searchResults
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Jordan wants to solve the following system using the elimination method:
2x + 3y = 10
x + y = 7
What number should the equation x + y = 7 be multiplied by to eliminate y?
Answer:
see explanation
Step-by-step explanation:
Given the 2 equations
2x + 3y = 10 → (1)
x + y = 7 → (2)
Multiplying (2) by - 3 and adding to (1) will eliminate y
- 3x - 3y = - 21 → (3)
Add (1) and (3) term by term to eliminate y, that is
- x = - 11 ( multiply both sides by - 1 )
x = 11
Substitute x = 11 into either of the 2 equations and evaluate for y
Substituting into (2)
11 + y = 7 ( subtract 11 from both sides )
y = - 4
Solution is (11, - 4 )
56. In a specific region of the country, the amount of a customer's water bill, W, is directly proportional to the
average daily temperature for the month, T, the lawn area, A, and the square root of F, where Fis the family size,
and inversely proportional to the number of inches of rain, R. In dne month, the average daily temperature is
78°F and the number of inches of rain is 5.6. If the average family of four who has a thousand square feet of laws pays $72.00 for water for that month, estimate the water bill in the same month for the average family of six who
has 1500 ft of lawn.
Formula=
Solve for k
Solve for w
Answer=
Answer:
Approximately
W=132.29
Step-by-step explanation:
W=k(TA√F)/R
T=78°F
R=5.6 inches
F=4
A=1000 square feet
W=$72
Solve for k
W=k(TA√F)/R
72=k(78*1000*√4)/5.6
72=k(78,000*2) / 5.6
72=k(156,000) / 5.6
72*5.6 =156,000k
403.2=156,000k
k=403.2/156,000
=0.002585
Solve for w when F=6, A=1500, T= 78, R=5.6 inches
W=k(TA√F)/R
W=0.002585(78*1500*√6) / 5.6
=0.002585(78*1500*2.4495) / 5.6
=0.002585(286,591.5) /5.6
=740.8390 / 5.6
=132.2927
W=132.2927
Approximately 132.29
The length of a rectangle is 3 inches greater than the width.
A. Write a polynomial that represents the area of the rectangle.
B. Find the area of the rectangle when the width is 4 inches.
Answer:
A - x (x+3) = Area of the rectangle
B- 28 inches squared
Step-by-step explanation:
B- using the formula from A
x = 4
x + 3 = 4 +3 = 7
4 times 7 is 28
Answer: 28ins²
Step-by-step explanation:
From the question, let the width of the rectangle = xins.
Therefore, the breadth = ( x + 3 )ins.
(A) The area of the rectangle which is L x B = x( x+ 3 )
= (x² + 3x)ins² . In polynomial.
(B) The area of the rectangle if the width is 4ins, that is if x = 4ins.To find the area, we substitute for x in the area above
= 4² + 3 x 4
= 16 + 12
= 28ins²
What is the average of 35, 27, 54, 28?
Answer:
36
Step-by-step explanation:
To find the average of a series of numbers, add them together and then divide by the count of numbers, i.e., 4.
(35 + 27 + 54 + 28) / 4 = 36
Answer:
answer is 36
Step-by-step explanation:
for finding average we have to add all the numbers and by dividing that by the total number present we can get the average
so there are 4 numbers
average= 35+27+54+28/ 4
or 144/4= 36 (ans)
thank uu
The first four numbers hexa said were 16 32 48 and 64 if she keep counting this way what is the 99th Number hexa will say
Answer:
316,912,650,057,057,350,374,175,801,344
Step-by-step explanation:
You can see that this sequence is geometric so you need to know the geometric sequence which is [tex]x_{n} =r^{n-1}[/tex] and if you plug in every thing you get [tex]x_{n}[/tex]=[tex]2^{99-1}[/tex] which would be [tex]2^{98}[/tex] which is 316,912,650,057,057,350,374,175,801,344
Elaine has 1 gallon of paint. She is going to pour it into a paint tray that measures 10 in wide 12 in long and 5 cm deep. ( 1 gallon=231 in^3, 1 inch=2.54cm)
Answer:
b. The paint will not fill the tray by 5.22 in3.
Step-by-step explanation:
The computation is shown below:
First we have to determine the volume of tray by using the following equation
[tex]V = L \times W \times H[/tex]
Now transform this from dimensions to inches
Now putting the values,
[tex]V = 10\times12\times (5\times(\frac{1}{2.54})) \\\\As\ 5 cm = 5 \times (\frac{1}{2.54})[/tex]
the volume would be equivalent to the
236.22 inches^3
Now 1 gallon is 231 inches^3
So, the remaining would be
= 236.22 - 231
= 5.22^3
Therefore the correct option is b.
Hence, all the other options are wrong
What type of number is 8/2?
Answer:
Step-by-step explanation:
8/2
Numerator is bigger than denominator. So it is improper fraction and rational number
Rational numbers are any number that can be written in p/q form
Answer:
it should be improper fraction
Step-by-step explanation:
because the numerator is greater than the denominator.
Hope it helps :)
Pritam. Sarah and Emily share some money in the ratios 3: 6:4
Sarah gets S15 more than Emily.
Work out the amount of money that Pritam gets.
Answer:
Pritam gets $22.50
Step-by-step explanation:
Ratios
Pritam =3
Sarah=6
Emily=4
The ratio between Sarah and Emily = 6:4
=3:2
If Sarah gets $15 more than Emily
Then,
Sarah gets $45
Emily gets $30.
The ratio between Pritam and Sarah = 3:6
= 1:2
Since Sarah gets $45,
Pritam gets half as much= $45 / 2
=$22.50
What is the approximate value of sin C?
Please help! Urgent
Answer:
B. 0.36
Step-by-step explanation:
Given:
Right ∆ABC,
AB = 5
BC = 13.93
CA = 13
Required:
Value of sin C
SOLUTION:
[tex] sin(C) = \frac{opposite}{hypotenuse} [/tex]
Opposite = 5
Hypotenuse = 13.93
[tex] sin(C) = \frac{5}{13.93} [/tex]
[tex] sin(C) = 0.3589 [/tex]
[tex] sin(C) = 0.36 [/tex]
the answer would be B, 0.36
A boat takes twice as long to travel 5 km upstream as it does travel 3km downstream in a river that flows at a rate of 2 kph. At what speed does the boat travel in still water?
Answer: 22 kph
Step-by-step explanation:
distance (d) = rate (r) x time (t)
UPSTREAM: d = 5 km, r = *x - y, y = 2 kph, t = 2t
DOWNSTREAM: d = 3 k, r = *x + y, y = 2 kph, t = t
*x is the speed in still water and y is the current of the water.
Upstream equation: 5 = 2t(x - 2) --> [tex]\dfrac{5}{2(x-2)}=t[/tex]
Downstream equation: 3 = t(x + 2) --> [tex]\dfrac{3}{x+2}=t[/tex]
Set the equations equal to each other to solve for x:
[tex]\dfrac{5}{2(x-2)}=\dfrac{3}{x+2}\\\\\\\text{Cross multiply:}\\5(x+2)=3\cdot2(x-2)\\\\\text{Distribute:}\\5x+10=6x-12\\\\\text{Isolate x:}\\10=x-12\\22=x[/tex]
Step-by-step explanation:
Step-by-step explanation:
distance (d) = rate (r) x time (t)
UPSTREAM: d = 5 km, r = *x - y, y = 2 kph, t = 2t
DOWNSTREAM: d = 3 k, r = *x + y, y = 2 kph, t = t
*x is the speed in still water and y is the current of the water.
Upstream equation: 5 = 2t(x - 2) --> \dfrac{5}{2(x-2)}=t
2(x−2)
5
=t
Downstream equation: 3 = t(x + 2) --> \dfrac{3}{x+2}=t
x+2
3
=t
Set the equations equal to each other to solve for x:
\begin{gathered}\dfrac{5}{2(x-2)}=\dfrac{3}{x+2}\\\\\\\text{Cross multiply:}\\5(x+2)=3\cdot2(x-2)\\\\\text{Distribute:}\\5x+10=6x-12\\\\\text{Isolate x:}\\10=x-12\\22=x\end{gathered}
2(x−2)
5
=
x+2
3
Cross multiply:
5(x+2)=3⋅2(x−2)
Distribute:
5x+10=6x−12
Isolate x:
10=x−12
22=x
Does anyone know this?
Answer:
The answer is "c"
Step-by-step explanation:
What are the solutions to the following equation? x²+8x+15=0
The value of x is = -5, -3
PLEASE HELP ASAP NEED NOW !!! For the given word problem, identify the rate of change.
Gasoline at a particular gas station costs $2.78 per gallon. If Cory buys $18 of gas, how many gallons did he buy?
(1 point)
a. $2.78
b. g
c. $18
d. 1
Answer:
6½ gallons
Step-by-step explanation:
Givem the cost of 1gallon of gas = $2.78. . If Cory buys $18 of gas, we are to find the number of gallons did he buy. To do that we will use the equality method as shown;
$2.78 ,= 1gallon
$18 = x gallon
Cross multiply
2.78 × x = 1×18
2.78x = 18
Divide through by 2.78
2.78x/2.78 = 18/2.78
.x = 6.5
Hence Cory buys about 6½ gallons of gas for $18
Can there be more than one coefficient in a expression?
Answer:
yes
Step-by-step explanation:
take for example
in the expression: 3x²+5x+2=0,
the coefficients here are +3 and +5 while +2 is a constant. +3 and +5 are coefficients of the variables x² and x respectively
At a particular moment, Earth is 4.3 x 109 km from Nepture and 1.5 x 109 from Saturn. How many times further away is Neptune from Saturn?
Answer:
Neptune is 2.86 times further away from Saturn.
Step-by-step explanation:
Distance from Neptune to Earth is [tex]4.3\times 10^9\ km[/tex]
Distance from Saturn to Earth is [tex]1.5\times 10^9\ km[/tex]
We need to find how many times Neptune is further away from Saturn. It can be calculated by dividing distance from Neptune to Earth to the distance from Saturn to Earth as follows :
[tex]\dfrac{d_N}{d_S}=\dfrac{4.3\times 10^9}{1.5\times 10^9}\\\\\dfrac{d_N}{d_S}=2.86\\\\d_N=2.86\times d_S[/tex]
It would mean that Neptune is 2.86 times further away from Saturn.
On three science tests, Olivia has received scores of 89%, 98%, and 96%. What is the lowest score Olivia can get on her fourth and final science test to
achieve an average score of 95%?
A.94%
B.97%
C.96%
D.95%
Answer:
B
Step-by-step explanation:
To achieve an average of 95% on 4 tests, the sum of the scores Olivia gets must be 95 * 4 = 380. Right now, the sum of her scores is 89 + 98 + 96 = 283 so she must get at least a 380 - 283 = 97% on her last test.
A box contains 10 transistors, 3 of which are defective. If 3 are selected at random, find the probability of the statements below. a. All are defective b. None are defective Answers has to be a fraction
Answer:
1. 1/120
2. 7/24
Step-by-step explanation:
n = 10
Number of defective = 3
1. Probability of all defective =
(Number of defective/n) x (number of defective -1/n -1)...(number of defective -n/n-1)
=3/10 x 2/9 X 1/8
= 6/720
= 1/120
2. probability of none defective
Since 3 are defective, those that are not defective = 7
The probability is therefore:
7/10 x 6/9 x 5/8
= 210/720
= 7/24.
PLEASE HELP ME!! The deepest point of Lake Titicaca in South America is -922 feet relative to its surface. The deepest point is 11,542 feet above sea level. What is the elevation of this lake?
Answer:
12,464 ft
Step-by-step explanation:
I assume that the elevation of the lake is the altitude at the surface of the water.
The surface of the lake is 922 ft above the deepest point of the lake.
11,542 ft + 922 ft = 12,464 ft
A painter can finish painting a house in 7 hours. Her assistant takes 9 hours to finish the same job. How long would it take for them to complete the job if they were working together? Group of answer choices
Answer:
x=3 15/16 hours together
Step-by-step explanation:
the painter paints 1/7 of the house in 1 hour
the assistant paints 1/9 of the house in 1 hour
x=# of hours it takes them together to paint the house
(1/7)x+(1/9)x=1 (job finished)
multiply both sides by the LCM which is 63
63(1/7)x+63(1/9)x=63(1)
9x+7x=63
16x=63
x=63/16
x=3 15/16 hours together