Answer:
4:50 PM
Step-by-step explanation:
I hope it helps you
At one school, the average amount of time that spend watching television each week is The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased from the previous mean of 21.6 hours. Classify the hypothesis test as left-tailed, right-tailed, or two-tailed.
a. Two-tailed
b. Right-tailed
c. Left-tailed
Answer:
Left Tailed
Step-by-step explanation :
Hypothesis Testing is done to test statistical significance of a mathematical assumption. Null Hypothesis is neutral hypothesis, Alternate Hypothesis shows deviation from neutral (null) hypothesis.
Null Hypothesis [H0] : Mean TV time = 21.6 hours
Alternate Hypothesis [H1] : Mean TV time < 21.6 hours
In left tailed test, alternate hypothesis states value less than null hypothesis assumed value. In right tailed test, alternate hypothesis states value greater than null hypothesis assumed value. In two tailed test, alternate hypothesis states value unequal (greater or less than) null hypothesis assumed value.
So, this case has left tailed test.
How many solutions does the following equation have? -2(-4x + 7) = -2 + 4x
Answer: Only 1
Step-by-step explanation: Isolate the variable. The solution is x=3.
What is the area of the circle? *.
Answer:
19.63cm²
Step-by-step explanation:
1/4 x π x 5² = 19.63495cm²
= 19.63cm²
Plz help me well mark brainliest if correct!!...
Answer:C
Step-by-step explanation:
Extinct species tend to be fully gone or not seen in the wild for quite some time endangered would be a better answer for A
Hope this helps
I WILL GIVE BRAINLIEST + LIKE + 5 STARS if you answer this short easy algebra question!!!!!!
Answer: 11pi/6, choice c
Step-by-step explanation:
Answer can be found on a unit circle. We had to memorize it in my class.
Simplify the following expression.
1/2 divided by 1/10
A. 1 whole 1/3
B. 1/20
C. 5
D. 1/5
Answer:
I got C.)5
Step-by-step explanation:
Which expression is not equal to 30
Answer:
(2 * 60 / 30) * (24 + 2) is not equal to 30
Step-by-step explanation:
1. (9 * 10) / (4 + 1 ) + 12 = 30
2. 2 + (30 - 8 / 4) = 30
3. (2 * 60 / 30) * (24 + 2) = 104 [not equal to 30]
4. (120 / 20) * (2 + 3) = 30
Therefore, the third expression is not equal to 30.
Thenks and mark me brainliest :)
In our very first module, we looked at numeration systems and the different bases that various cultures used. The Babylonian system was base 60; the Mayan system was base 20 (almost); and our Hindu-Arabic system is base 10. You read in the Grace Hopper biography that computers use a base 2 system. In base 2, only two symbols are used, so all numbers are represented with 0s and 1s.
A. Change the number 100 (base ten) to a numeral in base two.
B. Change the number 1010101 (base two) to a numeral in base ten.
C. This is a fun problem! The moon is approximately 238,900miles from Earth.
Admiral Hopper explained to David Letterman that a nano-second is one-billionth of a second. The maximum distance that electricity (or light) can travel in one nano-second is approximately one foot. How many seconds will it take to send an electronic signal from Earth to the Moon? If the signal bounces right back, how long will it take for the signal to go to the moon and come back to Earth? In this episode, Leonard and the other guys send laser signal to the moon and back. Leonard will tell you how long it took for the signal to go to the moon and back.
Answer:
1100100 base 2
85 base 10
2.522784 seconds
Step-by-step explanation:
Convert 100 from base 10 to the base 2
Reduce 100 by 2 until 0 ; the reminder obtained is written from bottom to top.
2 | 100
2 | 50 r 0
2 | 25 r 0
2 | 12 r 1
2 | 6 r 0
2 | 3 r 0
2 | 1 r 1
__0 r 1
Arranging from the bottom : 1100100 base 2
100 base 10 = 1100100 base 2
1010101 base 2 to base 10
1*2^6 + 0*2^5 + 1*2^4 + 0*2^3 + 1*2^2 + 0*2^1 + 1*2^0
64 + 0 + 16 + 0 + 4 + 0 + 1 = 85 base 10
C)
1 mile = 5280 feets
Distance from earth to moon = 238900 miles
Distance in feets :
(5280 * 238900) = 1261392000 feets
Total distance from moon and back to earth = 2 * 1261392000 = 2522784000 feets
Using the relation :
Speed = distance / time
Speed = 1 feet per nano second
Distance = 2522784000 feets
1 = 2522784000 / time
Time = 2522784000 nano seconds
Converting to second :
2522784000 / 1000000000
= 2.522784 seconds
Enter the slope-intercept equation of the line shown below
Answer:
Step-by-step explanation:
y = -2x - 4
Con la información que se encuentra a continuación completar la tabla sobre el valor posicional de los números.
- Carmen sabe que la población de la provincia de Tungurahua es de 581389 habitantes y desea conocer el valor posicional de cada número que forma la cantidad de pobladores.
CM DM UM C D U
b) Descompongo el número de pobladores de la provincia de Tungurahua
....................................................................................................................
c) Escribo el número en letras ................................................
Answer:
ok
Step-by-step explanation:
to hablando Espanol j
A line has a slope of -5 and has a point of (-2,2) and (-1, -3). Write the equation for the line in slope intercept form.
9514 1404 393
Answer:
y = -5x -8
Step-by-step explanation:
The y-intercept can be found from ...
b = y -mx
Using the first point, we have ...
b = 2 -(-5)(-2) = -8
Then the slope-intercept equation is ...
y = mx + b . . . . . . . . for slope m and y-intercept b
y = -5x -8
Answer:
the answer is
y=-5×-8
Step-by-step explanation:
:))
Use side ratios to determine if the triangles in each pair are similar. If so, complete the similarity statement. NO LINKS!!!
9514 1404 393
Answer:
3) ΔQRS ~ ΔQFG
5) ΔRST ~ ΔGFE
Step-by-step explanation:
3) Shortest to longest, the side ratios are ...
RQ : QS = 6 : 12 = 1 : 2 (reduced)
FQ : QG = 2 : 4 = 1 : 2 (reduced)
ΔQRS ~ ΔQFG
__
5) FE : EG : GF = 18 : 24 : 26 = 9 : 12 : 13 (reduced)
ST : TR : RS = 27 : 36 : 39 = 9 : 12 : 13 (reduced)
ΔRST ~ ΔGFE
What is the change in y?
Answer:
+4
Step-by-step explanation:
Answer:
-4.
Step-by-step explanation:
Change in y is 11 - 15 = -4 ( 7 - 11 = -4)
Please help
Hassan jarred 12 liters of jam after 6 days. How many days does Hassan need to
spend making jam if he wants to jar 14 liters of jam in all? Assume the relationship
is directly proportional.
Answer: 7 days
Step-by-step explanation: if he can make 12 liters in 6 days then you can divide 12 by 6 to know he can make 2 liters in 1 day. If he only needs 2 more liters, he only needs one more day and he has already spent 6 days and adding the one extra day, it would be 7 days
Rashard is a running back on his football team. He rushed for 418 yards in
the first five games of the season. At this rate, how many yards would he
rush for in 16 games? *
what instrument would you use to measure the following:speed
Answer:
speedometre
Step-by-step explanation:
it's used for mostly by police officer s
Answer:
Speedometer
Step-by-step explanation:
Mainly used to determine the speed of a vehicle
A company developing a new cellular phone plan intends to market their new phone to customers who use text and social media often. In a marketing survey, they find that customers between age 18 and 34 years send an average of 48 texts per day with a standard deviation of 12. The number of texts sent per day are normally distributed.
Required:
a. A customer who sends 78 messages per day would correspond to what percentile?
b. A customer who sends 78 messages per day would be at ______th percentile.
Answer:
A customer who sends 78 messages per day would be at 99.38th percentile.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Average of 48 texts per day with a standard deviation of 12.
This means that [tex]\mu = 48, \sigma = 12[/tex]
a. A customer who sends 78 messages per day would correspond to what percentile?
The percentile is the p-value of Z when X = 78. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{78 - 48}{12}[/tex]
[tex]Z = 2.5[/tex]
[tex]Z = 2.5[/tex] has a p-value of 0.9938.
0.9938*100% = 99.38%.
A customer who sends 78 messages per day would be at 99.38th percentile.
Please help math thank you!!!
Answer:
I believe it's A, since the rotation went to the positive side of y and negative side of x
Step-by-step explanation:
please help
-i think it’s equivalent but i’m not really sure
-will reward brainliest
Answer:
They're literally right on top of each other, u got this
Step-by-step explanation:
they are equivalent
If a1 = 6 and an
-5an-1 + 4 then find the value of a4.
Help
Answer:
A4
Step-by-step explanation:
1) Solve for Side A.
2) Solve for Angle B.
Answer:
solution given;
let
AB=a
AC=b=30ft
AB=c=20ft
<A=115°
By using Cosine rule.
a²=b²+c²-2bc cos angle
a²=30²+20²-2*30*20 Cos 115°
a²=1807.1419
a=√[1807.1419]
a=42.51
Side A is 42.51ft.
Again
Cos B=[tex] \frac{a²+c²-b²}{2ac} [/tex]
Cos B=[tex] \frac{42.51²+20²-30²}{2*42.51*20} [/tex]
Cos B=0.7687
<B=Cos -¹(0.7687)
<B=39.46°
Angle B is 39.46
___________________________________
To find [tex] \tt{\overline{A}}[/tex]Given that:[tex]\quad\quad\quad\quad\tt{ \angle{A = 115° }}[/tex]
Using cosine rule:[tex] \tt{\overline{A}²=b²+c²-2bc \cos( \angle{a}) }[/tex]
[tex] \tt{\overline{A}²=(30)²+(20)²-2(30)(20) \cos( \angle{115°}) }[/tex]
[tex] \tt{\overline{A}²=900+400-2(600) \cos( \angle{115°}) }[/tex]
[tex] \tt{\overline{A}²=1300-1200 \cos( \angle{115°}) }[/tex]
[tex] \tt{\overline{A} ²=1807.1419}[/tex]
[tex] \tt{\overline{A}= \sqrt{ 1807.1419}}[/tex]
[tex] \pink {\boxed{ \tt{ \overline{A}=42.51}}}[/tex]
Now, to find [tex]\tt{ \angle{B}}[/tex][tex] \tt{ cos\;B = \frac{ {a}^{2} + {c}^{2} - {b}^{2} }{2ac} }[/tex]
[tex] \tt{ cos\:B = \frac{ {42.51}^{2} + {20}^{2} - {30}^{2} }{2(42.51)(20)} }[/tex]
[tex] \tt{ cos\:B = 0.7687}[/tex]
[tex] \tt{ \angle{B} = { \cos}^{ - 1} (0.7687)}[/tex]
[tex]\pink{\boxed{\tt{ \angle{B} = {39.46°}}}}[/tex]
___________________________________
#CarryOnLearning
✍︎ C.Rose❀
give the other person brainiest please
Answer:
what??????????????????????
Step-by-step explanation:
Answer:
am pro am big brain two
:D
Step-by-step explanation:
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Lines that appear to be tangent are tangent. If O is the center of the circle, what is the value of x?
A. 240°
B. 60°
C. 140°
D. 120°
Answer:
a 240
Step-by-step explanation:
17. Before rock climbing, Michelle wants to know how
high she will climb. She places a mirror on the
ground and walks backward until she can see the
top of the cliff in the mirror. She drew a sketch of
the situation. What is the height of the cliff?
Top of cliff
х
mirror
Michelle
5.5 ft
4 ft
16 ft
A. 16.5
B. 17.5
C. 20
D. 22
Answer:
22ft
Step-by-step explanation:
Find the diagram attached
Since the triangles are mirror images of each other, this shows that they are similar triangles
Taking the ratio of the sides of the triangle and equating it to a constant, we will have;
5.5/4 = x/16
Cross multiply
4 * x =5.5 * 16
4x = 88
x = 88/4
x = 22ft
Hence the required value of x is 22ft
there are 90 kids in the band. 20% of the kids own their own instruments, and the rest rent them. how many kids own their own instrument?
Answer:
18 kids
Step-by-step explanation:
Identify JK. JK and JM are tangent to W.
Answer:
B. 8
Step-by-step explanation:
Based on the tangent theorem, when two tangents meet at an external point of a circle, the length of the two tangents are said to be equal in length.
Therefore:
JK = JM
Substitute
5x - 12 = x + 4
Collect like terms
5x - x = 12 + 4
4x = 16
4x/4 = 16/4
x = 4
✔️JK = 5x - 12
Plug in the value of x
JK = 5(4) - 12
JK = 20 - 12
JK = 8
Two numbers have a difference of 12. The smaller of the two numbers is 3 less than double the other. What are the two numbers?
Answer:
-9,-21
Step-by-step explanation:
let the numbers be x and y and x>y
x-y=12
y=2x-3
x-(2x-3)=12
x-2x+3=12
-x=12-3
-x=9
x=-9
y=2(-9)-3=-18-3=-21
The Unit Circle
Determine the coordinates of the point on the unit circle corresponding to the given central angle. If necessary, round your results to the nearest hundredth.
29°
a. (0.87, 0)
b. (0.87, 0.48)
c. (0.48, 0.87)
d. (1, 0.48)
Please select the best answer from the choices provided
Answer:
B. (0.87, 0.48)
Step-by-step explanation:
I calculated it logically
Hello Good morning can someone give me the answer of this operation?
39 + 1 - 24 / 6=
Also can you tell me the order? :> Thanks!!
Answer:
The answer is 36
Step-by-step explanation:
Because 39+1=40
So then 40-24=16
and then divided by 6 is 36 because when you divide you multiply
Is quadrilateral UVWX a parallelogram? Why or why not?
A)
There isn't enough information.
B)
Yes, because adjacent sides aren't perpendicular.
C)
No, because opposite sides aren't congruent.
D)
Yes, because opposite sides are parallel.
Answer:
D) Yes, because opposite sides are parallel.
Step-by-step explanation: