Answers
Related Questions
The melting/freezing point of mercury is –39ºC. A scientist put liquid mercury into a freezer that is kept at a constant temperature of –35ºC. Will the liquid mercury freeze?
Answers
Answer:
The mercury will not freeze because the freezer is warmer than the freezing point of mercury.
Step-by-step explanation:
A "freezing point" is a point that allows a liquid to solidify. This is lower than the melting point (of course). However, specific liquids freeze at varying freezing points.
For example, the freezing point of water is 0°C while the freezing point of Mercury is -39°C. This means that water will only freeze once it reaches a temperature of 0°C or lower than this. Same goes for Mercury–it needs to reach the temperature of -39°C or lower in order to freeze.
Hello! Please answer this question with all of the info it is asked for. Please be sure to include all of your work and share any of your thoughts you had when solving. Please do not answer unless you know the answer. Thanks! Good Luck!
A golf ball is launched straight up into the air from the ground with an initial velocity of 160 ft/s. The function that models the ball's height is: h(t) = -16t^2 + 160t.
a) Find how long it takes for the golf ball to reached its maximum height.
b) Determine how long the golf ball is in the air before it hits the ground.
c) Determine the maximum height that the golf ball reaches.
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Answer:
a) 5 secb) 10 secc) 400 mStep-by-step explanation:
Given is the quadratic function:
h(t) = -16t^2 + 160tThis gets maximum value at vertex, which is achieved at:
x = -b/2a, of y = ax^2 + bx + cIn our case:
t = -160/2(-16) = 5 secondsMaximum height is at vertex:
h(5) = -16*5^2 + 160*5 = 400 mTime the ball hits the ground, h(t) = 0:
-16t^2 + 160t = 0t^2 - 10t = 0t(t - 10) = 0t = 0 seconds is the starting pointt = 10 seconds is when the ball hits the groundDrag the missing word into place
0.5 is the ___ that is equal to one half
Fraction
Hundredth
Decimal
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Answer:
Decimal
Step-by-step explanation:
its a Decimal because 0.5 is an fact a decimal and its is equal to half and you can put 2 and 2 together and say it is a decimal just by how it looks
:) i hope you get the question righttt trust me its right i got it right on flocabulary.
The missing word into place is Decimal. Hence option 3 is true.
Used the concept of decimal number that states,
In Algebra, decimals are one of the types of numbers, which has a whole number and the fractional part separated by a decimal point.
Given that the number is,
0.5
Now the number is written as,
0.5
5/10
1/2
And, the number 0.5 is in the form of a Decimal.
Hence, The missing word place is Decimal.
Therefore, option 3 is true.
To learn more about decimal numbers:
brainly.com/question/1285738
#SPJ6
I WILL GIVE 50 POINTS FOR AN ANSWER The daily cost of hiring a clown, y, to work x hours at a birthday party can be modeled using a linear function. The clown charges a fixed cost of $50 for booking plus an additional cost of $15 per hour. The clown works a maximum of 6 hours per day.
For one day of work, what is the range for this situation?
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Are the vectors U1 = and U2 = parallel?
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Answer:
Express the vector →u below as a sum of two vectors →u1 and →u2, where →u1 is parallel to the vector →v given below, and →u2 is perpendicular to →v.
The price of a large pack of toilet paper before the pandemic was about $9. During the crazy
toilet paper rush of 2020, the price rose to around $20. State whether this was an increase or
decrease, and calculate the percent of change. I
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Answer:
it is an increase because it is going up
Step-by-step explanation:
it is a 122.222% increase
just helping people get points :D
Answers
Answer:
thank you so much for the points
Step-by-step explanation:
:D
8th Grade Math, Helppppppppp Now Plsssssss! What is the function of the nucleus in plant and animal cells? A. Produces all the power of the cell B. Creates proteins within the cell C. Control all cells activity, contains DNA D. Allows things in an out of the cell
Answers
Answer:
science budo but nucleus controls cell activity and contains dna
Answer:
C. Control all cells activity, contains DNA
Step-by-step explanation:
The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA. It then sends the subunits out to the rest of the cell where they combine into complete ribosomes.
Also.... that's not math.
write an expression in terms of n
adds 2 to the number and then multiplies the result by 3
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Answer:
Step-by-step explanation:
Let the number = n
Add 2 to the number : n + 2
Multiply the result by 3 : (n + 2) *3
= n * 3 + 2*3
= 3n + 6
Is 18 and 0.3 equivalent
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Answer:
No
Step-by-step explanation:
Because 0.3 is a decimal and 18 is a whole number.
0.3 = 3/10 which is 30%
 (6,-3) and y = - 6x - 3
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is it if this point is on the line?
cause it's not
-y=mx+b
3=-6(6)-3
-3=-36-3
-3 does not equal -39
hence, point is not on the line
some one please help me
Answers
Answer:
b>k c>L ac>JL bc>KL
Step-by-step explanation:
poggers
Answer:
B = K
C = L
AC = JL
BC = KL
hope this helps!
2-b/3=-5/2 what dose b =
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Answer:
I believe that the answer is b= 19/2.
if x is the first of two consecutive integers, express the sum of the two integers in terms of x
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Answer:
2x+1
Step-by-step explanation:
x = 1st integer
x+1 = next consecutive integer
The sum is
x+ (x+1)
Combine like terms
2x+1
let the first integer be x and the second be x + 2
then the sum is x +x+2 = 2x +2
points for you........................................
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Answer:
Thanks man..............
Answer:
thx
Step-by-step explanation:
2 divided by 9/10 (in fraction or mixed number form)
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Answer:
decimal: 2.22 mixed number: 2 2/9
Graph: y=3/4x+5 Please let me know guys
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Evaluate the equation r-4.012=5.313
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Answer:
r = 9.325
Step-by-step explanation:
Hope this helps!!!
Solve for x . 955=5x
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Answer:
191
Step-by-step explanation:
955 = 5x
divide both sides by 5 to get x by itself
x = 191
DEFG is a parallelogram. Segment DH = 2y + 6, segment HF = 4x + 1, segment HE = 3x + 2 and segment GH = 20. Find the value of GE and DF.
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Answer:
[tex]DF = 38[/tex]
[tex]GE = 40[/tex]
Step-by-step explanation:
Given
[tex]DH = 2y + 6,[/tex]
[tex]HF = 4x + 1,[/tex]
[tex]HE = 3x + 2[/tex]
[tex]GH = 20.[/tex]
See attachment for parallelogram.
Required
Find GE and DF
From the attachment:
[tex]GH= HE[/tex]
Substitute values for GH and HE
[tex]20 = 3x + 2[/tex]
Subtract 2 from both sides
[tex]20-2 = 3x + 2-2[/tex]
[tex]20-2 = 3x[/tex]
[tex]18= 3x[/tex]
[tex]3x = 18[/tex]
Divide both sides by 3
[tex]x = \frac{18}{3}[/tex]
[tex]x=6[/tex]
[tex]GE = GH + HE[/tex]
[tex]GH= HE[/tex]
So:
[tex]GE = GH + GH[/tex]
[tex]GE = 20 + 20[/tex]
[tex]GE = 40[/tex]
To find DF, we find y first:
[tex]DH = HF[/tex]
[tex]2y + 6 = 4x + 1[/tex]
Subtract 6 from both sides
[tex]2y +6- 6 = 4x + 1-6[/tex]
[tex]2y = 4x + 1-6[/tex]
Substitute 6 for x
[tex]2y = 4*6 + 1-6[/tex]
[tex]2y = 19[/tex]
Divide both sides by 2
[tex]y = \frac{19}{2}[/tex]
[tex]y = 9.5[/tex]
DF is then calculated as"
[tex]DF = DH + HF[/tex]
[tex]DF = 2y+6 + 4x+1[/tex]
Substitute values for x and y
[tex]DF = 2*9.5+6 + 4*3+1[/tex]
[tex]DF = 38[/tex]
The director of the admissions at a large university advises parents of incoming students about the cost of textbooks during a typical semester. He selected a sample of 100 students and recorded their textbook expenses for the semester. He then computed a sample mean cost of $315.40 and a sample standard deviation of $43.20
Required:
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
Answers
Answer:
The calculated value t = 3.5648> 1.9842 at 0.1 level of significance
The null hypothesis is rejected
The mean of the sample does not come from the Population
Step-by-step explanation:
Step(i):-
Given that sample size 'n' = 100
Mean of the sample x⁻ = 315.40
The standard deviation of the sample (s) = 43.20
Level of significance = 0.1
Mean of the Population = 300
Null hypothesis: H₀: x₀ = μ
Alternative Hypothesis: H₁: x₀ ≠ μ
Step(ii):-
Test statistic
[tex]t = \frac{x^{-}-mean }{\frac{S}{\sqrt{n} } }[/tex]
[tex]t = \frac{315.40-300 }{\frac{43.20}{\sqrt{100} } }[/tex]
t = 3.5648
Degrees of freedom = n-1 = 100-1 =99
[tex]t_{\frac{0.1}{2} , 99} = t_{0.05,99} = 1.9842[/tex]
The calculated value t = 3.5648> 1.9842 at 0.1 level of significance
The null hypothesis is rejected
The mean of the sample does not come from the Population
On a windy morning, a hot air balloon starts rising and flying away from the top of a
hill. The altitude, h, in feet, of the balloon x hours after starting its ascent from the
hill, can be modeled by the function: h(x) = -16x2 + 64x + 80.
The balloon will reach its maximum height after how many hours?
Answers
Answer: (2,144)
Step-by-step explanation:
I WILL GIVE BRAINLIEST !! PLEASE HURRY IM TIMED
(you can still use desmos btw)
answer choices
A. Haley’s family by 5 miles per hour
B. Alex’s family by 10 miles per hour
C. Haley’s family by 10 miles per hour
D. Alex’s family by 5 miles per hour
Answers
Answer:
alexs family by 10 Mph
Step-by-step explanation:
Simplify the expression, 18 + (-5) -5/7j - 3/7j + 6
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Answer:
[tex]18 + ( - 5) - \frac{5}{7j} - \frac{3}{7j} + 6 \\ = (18 - 5 + 6) - ( \frac{5}{7} + \frac{3}{7} ) \frac{1}{j} \\ = 19 - \frac{8}{7j} [/tex]
Amelia launched her science fair rocket, and then backed away. The path of the rocket is given by the equation below, where y is the the height in feet amd x is the time in seconds the rocket is in the air y=-2×^2+5x+7
1)when does the rocket hit the ground?
2)what is the maximum height of the rocket?
Answers
Answer:
1)The rocket hit the ground at [tex]x = \frac{5}{4}[/tex]
2)The maximum height of the rocket = 12.468 feet
Step-by-step explanation:
Step(i):-
Given equation
y = -2 x² + 5 x + 7 ...(i)
Differentiating equation (i) with respective to 'x' , we get
[tex]\frac{dy}{dx} = -2( 2x) +5(1) = -4x +5[/tex]
Equating zero
[tex]\frac{dy}{dx} = 0[/tex]
⇒ -4 x +5 =0
⇒ -4 x = -5
⇒ [tex]x = \frac{5}{4}[/tex]
The rocket hit the ground at [tex]x = \frac{5}{4}[/tex]
Step(ii):-
[tex]\frac{dy}{dx} = -4x +5[/tex] ...(ii)
Again differentiating equation (ii) with respective to 'x' , we get
[tex]\frac{d^{2} y}{dx^{2} } = - 4(1) <0[/tex]
The maximum height at x = [tex]\frac{-5}{4}[/tex]
y = -2 x² + 5 x + 7
[tex]y = -2 (\frac{5}{4})^{2} + 5 (\frac{5}{4} ) + 7[/tex]
[tex]y = \frac{-2(25)+ 25 (16)+7(64)}{64}[/tex]
[tex]y = \frac{798}{64} = 12.468 feet[/tex]
The maximum height of the rocket = 12.468 feet
3. 1,199 / 5 =
What is the compatible number to find two estimate the quotient is between
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Answer:
in decimal = 239.8
........
4.
Darnell starts saving the same amount from each weeks paycheck. The table shows the total balance f(n) of
his savings account over time in weeks.
Time (weeks) n
2
3
Savings Account Balance(s) fin) $250 $380
$510 $640
Determine the value of f(9), and explain what it represents in this situation.
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Answer:32
Step-by-step explanation:
A smart phone regularly sells for $180.00 but is on sale for 30% off. What is the amount of the discount?
Answers
Answer:
$54
Step-by-step explanation:
The amount of the discount can be found by multiplying 180 by 0.3 which is 54.
If you also need to know the new total it would be $126 because
180 - 54 = 126
Why does every prism have 2/3 as many vertices as edges?
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Step-by-step explanation:
Because it's impossible to not have a shape without edges
4j = 0.7 Solve for j
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Answer:
0.175
Step-by-step explanation:
[tex]\frac{4j}{4} =\frac{0.7}{4}[/tex]
j=0.175
You should get 0.175
