Complete Question
A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackthorn wand has a price of 45.20. What proportion of wand prices are lower than the price of the blackthorn wand? You may round your answer to four decimal places
Answer:
0.1151
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score = $45.20
μ is the population mean = $50
σ is the population standard deviation = $4
We are solving for x < 45.20
Hence:
z = 45.20 - 50/4
z = -1.2
Probability value from Z-Table:
P(x<45.20) = 0.11507
Approximately to 4 decimal places = 0.1151
Therefore, the proportion of wand prices that are lower than the price of the blackthorn wand is 0.1151
HELP!!! A scientist needs 10 litters of 20% acid solution for an experiment, but she has only a 5% solution and a 40% solution. To the nearest tenth of a liter, about how many liters of the 5% and the 40% solutions should she mix to get the solution she needs
Answer:10 liter * 20%= x liter*40% + (10- x) liter*5%
10l * 20%= x liter * 35% + 10 liter*5%
x liter *35 = 10l * 20 - 10l *5= 10l*15
x liter = 10l *15/35= 4.28 L= 4.3L
The volume of 40% solution= 4.3L
The volume of 5% solution= 10L- 4.3L= 5.7L
Step-by-step explanation:
In this question, you want to make 10 liters 20% concentration solution by mixing 5% and 40% concentration. There should be multiple answers to this question. Assuming that the total volume of 5% and 40% solution equal to 10L(no solution wasted), then you can determine the volume of solution needed. The formula should be:
True or false please
It goes completely diagonal so True
Have a good day!
(It also has matching points at the middle if you need more evidence XD)
A rectangle has a width that is 5 feet less than the length. The area of the rectangle is
126 square feet. Find the width of the rectangle.
Answer:
630
Step-by-step explanation:
what are the coordinates of the yellow square
I need this ASAP. I WILL MARK BRAINLIEST AND GIVE 50 POINTS!!
PLEASE I need this quick
Answer:
there were 8 adults and 7 students
Step-by-step explanation:
7.25(8) + 5.5(7) = 96.5
the numbers in the parenthesis stand for the number of people
have a great day :D
Step-by-step explanation:
The Answer Is
8 Adults And 7 Students
Someone please do this for me. I would really appreciate it. I’ll make you brainliest!
Answer:
44.1 degrees
Step-by-step explanation:
In this diagram we are given the hypotenuse (39) and the side adjacent to the angle x. The cosine function relates the hypotenuse and adjacent side as follows:
cos x = 28/39
Using the inverse cosine function on a calculator, we get x = 0.7699 radian, which converts to degrees if we multiply this result by 180/π:
Angle x, in degrees, is 44.1 degrees, which is to the nearest tenth.
Solve for d:
d over 12 = 5.76
1. d = 17.76
2. d = 69.12
3. d = 0.48
It costs $4 to park a car in a lot and $0.50 per hour to keep it there. Write a function to represent the total cost to a car parked in this lot for h hours?
HEY GUYSS PLEASE HELP I REALLY NEED THIS HEPP AND I NEED TO SHOW WORK I will mark brainliest
Answer:
like terms
1.-2x-p+7z
2.7m+5n-3
3.6t+2+3s
Distribute and simplify
1.-24t-30x-12+3x
-24t-27x-12
2.10x+15y+35-5x-3y
5x+12y+35
3.24x-12-2x
22x-12
Answer:
points for points
Step-by-step explanation:
aint gotta explain $ hit.
Select all ordered pairs that are located in the third quadrant of the coordinate grid.
a) 2, -8
b) -3, -1
c) 5, 4
d) -4, -6
$800 invested at 5.25% simple interest for 4 yrs.
Answer:
14 dollars.
Step-by-step explanation:
With annual interest rate, 5.25 interest rate is $14.00
Answer:
$968
Step-by-step explanation:
800 × 0.0525 × 4 = 168 (interest)
168 + 800 = 968 (total)
PLEASE HELP ASAP!! ITS DUE VERY SOON AND THIS IS MY LAST QUESTION. ILL MARK YOU THE BRAINLIEST
Answer:
can you show it a bit closer?! i cant read it
Step-by-step explanation:
(a) 5.33 cm
(b) 6.33 cm
(c) 7.33 cm
(d) 8.33 cm
SORRY GUY'S OPTION GLT AA GYE THE PHLE VALE QUES MEI.....SO.....
Answer:
es la b 6.33 amigo ;) adios
Please help. Also please show your work. Y/5 - 2/5
Answer:
0.2(y-2)
Step-by-step explanation:
factor out 1/5 from the expression
1/5×(y-2)
0.2(y-2)
PLEASE HELP 20 POINTS PLEASE HELP BROOO
Lake Ontario is 24,360 square miles smaller
than the size of Lake Superior. If Lake Ontario
is 7,340 square miles, how many square miles
is Lake Superior?
Answer: 31700 sq mi
Step-by-step explanation: Well in order to find out the sq mi for Lake Superior you will add 7340 and 24360 which equals 31700 sq mi.
Sabendo que duas retas – e – são cortadas por uma transversal , que formam com um ângulo reto e com um ângulo de , determine as medidas dos ângulos formados pelas retas , e .
Answer:
Ok
Step-by-step explanation:
ICUP AT NIGHT LICK IT
273-8255 call for 300 points
Answer:
Step-by-step explanation:
Uhhh
Answer:
thats like saying 1st one to call 911 gets buddy bucks
Step-by-step explanation:
Confused abt this problem plz help it’s due at 12 :)
Answer:
The correct answer is Emmitt.
Step-by-step explanation:
no time to explain, you need this finished, also next time don't wait too late to do work, just saying ;)
- What is the Focus? Vertex: (0,0) and Directrix: x=-1
Answer:
ghjyudmere
Step-by-step explanation:
Robert is painting a portrait. He is using a canvas that has a width of 12 inches and a height of 16 inches. Find the location of a focal point on the portrait using the golden ratio
Answer:
0.56 inches from the vertex of the canvas
Step-by-step explanation:
Golden ratio can be interpreted as
B / A = ( A + B ) / B ----- ( 1 )
A = smaller side = 12 inches
B = larger side = 16 inches
Back to equation 1
16 / 12 = ( 16 + 12 ) / 16
4 / 3 ≠ 7 / 4
The Golden ratio can not be applied because the rule is not obeyed
The focal point can be determined as :
( longest width / 2 )= 12 / 2 = 6^ 2 = 36 ---- 2
(4* depth) = 16 * 4 = 64 ---- 3
hence the focal point ( 2 / 3 ) = 36 / 64 = 0.56 inches from the vertex of the canvas
Escreva uma equação do 2 grau que tenha: a) - 5 e 3 como raízes. b) x, +x, = 17 x, x = 70, sabendo que x, e x, são as raízes. = = C) 0 e 6 como raizes. d) Duas raízes reais iguais. e) Nenhuma raiz real.
In 2 years Peter will be twice as old as his sister Eve. The sum of their present age is 26.
i need answers asap thank youuu!!
Answer:
Eve is 8, 10 in 2 years and peter is 18, 20 in two years
Step-by-step explanation:
26/2=13
Eve = 13 Peter=13
Then just keep subtracting from eve then adding that on to peter. Then add two years everytime for the age they will be in two years
And yh it is basically trial and error
sorry if you get the explanation
Find the volume of a hemisphere : diameter = 20 m
Round to the nearest tenth.. Single choice.
2093.3 cubic meters
4186.66 cubic meters
4186.7 cubic meters
2093.33 cubic meters
Answer:
40
4186.66
Step-by-step explanation:
What was the main purpose of the Declaration of Independence?
Answer:
The main purpose of America's Declaration of Independence was to explain to foreign nations why the colonies had chosen to separate themselves from Great Britain. The Revolutionary War had already begun, and several major battles had already taken place.
Step-by-step explanation:
Given that x and y are positive integers and (x*2)+x(2^2)+(y*2^3)+(y*2^4)=42, what is the value of xy? PLEASE HELP!!!!!!
Note: Answer is not x=0, y=7 or y=0, x=7
Answer:
x = 3, y = 1
Step-by-step explanation:
If your question is this: 2x + 4x + 8y + 16y = 42
6x + 24y = 42
3x + 12y = 21
For x and y are positive integers, there is only 1 set of x = 3 and y = 1 is the solution (because x = 7 and y = 0 is excluded)
check: 6 + 12 + 8 + 16 = 42
Directions: Foil the following if the answer is not standard form then standardize it.
Equation: (x+4) (4x−5)
find x...............
Answer:
x=2
Step-by-step explanation:
1. AB=AC (The triangle is isosceles. This means that at least two of its sides are equal in length. Looking at the triangle in the picture, sides AB and AC look the same, so we will assume that they are equal. Note that as you get more advanced, assuming isn't the best strategy. You should always try to look for hints if you are ever unsure. For example, if there are two angles that are the same measure in a triangle, the two sides that are only touching one of these angles are equal in length. This is called the base angles theorem converse.)
2. 9x-3=6x+3 (Rewrite sides AB and AC as the values given in the picture. This is called substitution.)
3. 9x=6x+6 (Add 3 to each side)
4. 3x=6 (Subtract 6x from each side)
5. x=2 (Divide each side by 3)
let me know if i did anything wrong, hope this helps!!
Tatăl Mariei i-a oferit acesteia 2 opțiuni pentru banii de buzunar: 1/4 din €5 sau 1/2 din €5. Care opțiune ar însemna mai mulți bani?
Answer:
1/2 din 5 €
Step-by-step explanation:
Opțiunea 1
1/4 din 5 €
= 1/4 × 5 €
= 1,25 €
Opțiunea 2
1/2 din 5 €
= 1/2 × 5 €
= 2,5 €
Prin urmare, opțiunea care ar însemna mai mulți bani este 1/2 din 5 €
What is the midpoint between (-8, 5) and (2, -2)?
(-5, 1.5)
(-6, 3)
(-3, 1.5)
(-5, 3.5)
Answer:
A. (-5, 1.5)
Step-by-step explanation:
Angle JKL is a straight angle. The measure of angle MKL is 85°. The measure of angle JKM is xº. What is the value of x?
Answer:
95°Step-by-step explanation:
Straight angle is 180°
JKL = MKL + JKM180° = 85° + xx = 180° - 85°x = 95°