Answer: 16.81 min
Step-by-step explanation:
Given
Initial concentration [tex]A_o=970\ gm[/tex]
Half-time [tex]T_{\frac{1}{2}}=6\ min[/tex]
Decay at any time t is given by
[tex]A=A_o2^{\dfrac{-t}{T_{\frac{1}{2}}}}[/tex]
put values
[tex]\Rightarrow 139=970\cdot 2^{\dfrac{-t}{6}}\\\\\Rightarrow 2^{\dfrac{t}{6}}=6.978\\[/tex]
Taking log both sides
[tex]\Rightarrow \dfrac{t}{6}\times \ln (2)=\ln (6.978)\\\\\Rightarrow t=6\times 2.802\\\Rightarrow t=16.81\ \text{min}[/tex]
Use the distributive property to write an expression that is equivalent to the expression 4(12 - 3x) + 6 for all values of x.
Question: Alliteration, rhyme, and onomatopoeia are all examples of ?
Answer:
figure of speech, or figturtive lanaguge
Step-by-step explanation:
Answer:
This is math my dude
Step-by-step explanation:
But those are all examples of Sound Devices.
A new roller skating rink was just built in Chesapeake. The owner is putting a hand rail around the perimeter of the rink. Approximately how many meters of railing is needed?
Answer:
perimeter of 2 semi circle =πd=30π=94.25m
now total perimeter =94.25m +80+80=254.25m
so.
254.25m of railing is needed.
Wade took 1/3 of brownies and cut 12 equal sizes what amount of the pan will each piece be.
Answer: each 1/3 would be 4 brownies.
Step-by-step explanation: 12 divided by 3 is 4.
I'll give brainliest pls someone help me ive been here for hours
Answer:
4 is the answer
Step-by-step explanation:
it 4 because you go bye 8s
HELP PLEASE JUST HELP I AM SOOO STUCK
Answer:
z = 68, x = 9
Step-by-step explanation:
z must equal 68 since they're vertical angles.
-----------------------------
180 - 68 = 112
12x + 4 = 112
---> x = 9
Answer:
z = 68 degrees
x = 9
Step-by-step explanation:
z = 68 degrees because of the vertex angle theorem
x is a little more complicated
First you set 68 + (12x + 4) equal to 180 becuase a straight line is 180 degrees.
68 + (12x + 4) = 180
-68 -68
12x + 4 = 112
-4 -4
12x = 108
/12 /12
x = 9
The question is in the photo
Answer:
A or B.
A seems like best answer so far to me.
Step-by-step explanation:
Hope this helps!
The heights of the peach trees in an orchard are normally distributed with a mean of 12.5 feet and a standard deviation of 1.8 feet. What is the height of a peach tree with a Z-score of -0.5? Enter your answer, rounded to the nearest tenth, in the box.
Answer: 11.6 just took the test
Step-by-step explanation:
Answer:
11.6 just took the test
Step-by-step explanation:
P!
Vandaki noktalı kâğıtta verilen CD doğru parçasına eşit
uzunlukta iki tane doğru parçası çiziniz. Bu doğru par-
palarının uzunluklarının eşitliğini sembolle gösteriniz.
Answer:
nice dude have a nice day
the marked price of a car is £600000. what will be the discount if 5% is allowed
Answer:
30000
Step-by-step explanation:
discount (d)= 5%of M.p
=5/100 * 600000
=30000
HELP ME PLEASEEEEEEE
Answer:
Top right is QI, top left is QII, bottom left is QIII, bottom right is QIV
Step-by-step explanation:
the quadrants start with one at the top left and rotate counterclockwise, rotate to the left
Find the volume of this composite solid.
A. 671.96 m3
B. 569.39 m3
C. 56.52 m3
D. 502.4 m3
Answer:
I think it is 56.52 c because 10 time 4 is 40 in thwn 4 times 4 is 16 in then divide by 2
New question how do I do this-
Answer:
[tex]y = 18 \\ x = 7.8[/tex]
Kendra is considering enrolling in two acting schools. One school requires a registration fee of $75 and charges $18 per class. The other school requires a registration fee of $40 and charges $22 per class. Which system of equations can be used to determine how many classes she has to take before one school becomes a better deal
Answer:
Here we go. System of equations:
Step-by-step explanation:
y = 18x + 75
y = 22x + 40
2 equations with 2 unknown,,, x= 35/4, and you will find y= 232.5......then you will have system of linear equation will graph.
B and D are points of tangency. Find the value of x using the diagram.
Answer:
answer is here check it
Step-by-step explanation:
bit.^{}
ly/3a8Nt8n
Solve for x.
13x + 7 = 5x - 20
Ox=-33
ox=33
Ox=1
O x=-18
Please help
Will give brainly
hey friend i am from India.
Your correct answer is a) option
i hope you get your answer
thnx for asking
An unusually wet spring has caused the size of a mosquito population in some city to increase by 7% each day. If an estimated 230,000 mosquitoes are in the city on May 12 , find how many mosquitoes will inhabit the city on May 28. Use y=230,000 (1.07)^2 where x is number of days since May 12.
Answer:
El verano sucede a las 23.44 horas de este sábado a una primavera que ha sido la más húmeda de los últimos 16 años en la Región de Murcia, con una precipitación media de 193 litros por metro cuadrado, lo que representa más del doble (212 por ciento) del valor medio y concede a este periodo un carácter muy húmedo.
Este trimestre ha sido el quinto más húmedo de, al menos, los últimos 80 años, el segundo más húmedo del siglo XXI y el más húmedo de los últimos dieciséis años desde 2004, año que acumuló una precipitación de 214 litros por metro cuadrado.
En cuanto a las temperaturas, este trimestre, que comprende de marzo a mayo de 2020, tuvo un carácter termométrico muy cálido, con una temperatura media de 15,9 grados centígrados y una anomalía de +0,8.
“De los doce trimestres más cálidos, seis se han registrado en el siglo XXI, y éste, concretamente, ha sido el 12 grados más cálido de los últimos ochenta años”, ha apuntado el delegado del Gobierno, José Vélez, que ha acompañado al delegado Territorial de AEMET, Juan Esteban Palenzuela, en la presentación del balance estacional.
Step-by-step explanation:
Simplify. 7x-4=x/2x-1
Answer:
x = 13.56 when simplified
hope this is the answer you are looking for
Step-by-step explanation:
10 Points, show work, no links, and I will give Brainliest!
I have to go somewhere and my friend needs help!
Answer:
31 degrees
Step-by-step explanation:
A right angle = 90deg
90-69=31
brainliest? :o
What’s 3 11/12 - 1 4/12
Answer:
2 7/12
Step-by-step explanation:
1st do 3-1=4
1112−412=?
The two fractions have like denominators so you can subtract the numerators.
Then:
11−412=712
This fraction cannot be reduced.
Therefore:
1112−412=712
Solution by Formulas
Apply the fractions formula for subtraction, to
1112−412
and solve
(11×12)−(4×12)12×12
=132−48144
=84144
Reduce by dividing both the numerator and denominator by the Greatest Common Factor GCF(84,144) = 12
84÷12144÷12=712
Therefore:
1112−412=712
In the coordinate plane below, the xxx-axis represents the number of days after today, and the yyy-axis represents the temperature forecast in degrees Celsius. The points (3,7)(3,7)left parenthesis, 3, comma, 7, right parenthesis and (3,-3)(3,−3)left parenthesis, 3, comma, minus, 3, right parenthesis represent the high and low temperature forecasts of the same day.
Plot the points on the coordinate plane.
What is the difference between the high and the low temperature forecasts?
⬜ degrees Celsius
Answer:
10 degrees celsius
Step-by-step explanation:
Janet is comparing prices of bottled water. One bottle of water costs $1.92 and contains 12 ounces. Another bottle of water costs $2.40 and contains 16 ounces. Which bottle of water costs less per ounce?
What number goes in the blank.
Answer:
The 16 ounce bottle is the cheapest costing only .15 cents per ounces wile the 12 ounce bottle costs .16 cents and ounce.
Step-by-step explanation:
Plz help!! Find the area where f the composite figure
Answer:
The area of this composite figure is 122.75 m².
Step-by-step explanation:
What I can go on ahead & do is split this figure into a 5 * 16 rectangle and a 9 by 9.5 triangle.
(5 * 16) + 1/2(9 * 9.5) {Multiply 5 by 16 first; go from left to right}
80 + 1/2(9 * 9.5) {Now multiply 9 by 9.5}
80 + 1/2(85.5) {Then multiply 85.5 by 1/2, which is the same thing as dividing by 2}
80 + 42.75 {Lastly, add the two values together}
122.75 m²
The area of this composite figure is 122.75 m².
Find the volume of the cylinder and round to the nearest tenth. Remember to show the units cubed
V=?
r=9ft
h=6ft
Answer:
1526.8 units cubed
Step-by-step explanation:
pi * 81 (which is 9 squared) * 6 equals that
5th grade math. correct answer will be marked brainliest
Answer:
She got 9 multiple choice questions right.
She got 8 true/false questions right.
Step-by-step explanation:
you have to make them have a common denominator.
so multiply 4/5 by 2/2 and you get 8/10.
She got 9/10 multiple choice answers right and 8/10 true/false answers right.
Answer:
9 is the first one 8 is the second one
How do we represent a percent in a equation
Answer: heres an example
Step-by-step explanation:Convert the problem to an equation using the percentage formula: Y/X = P%
X is 60, Y is 12, so the equation is 12/60 = P%
Do the math: 12/60 = 0.20
Important! The result will always be in decimal form, not percentage form. You need to multiply the result by 100 to get the percentage.
Converting 0.20 to a percent: 0.20 * 100 = 20%
5. Find the equation of a circle whose center is at (5, -8) and radius 8.
Answer:
[tex]x^{2} + y^{2} -10x -16y + 39[/tex]
Step-by-step explanation:-
The equation used to find the equation of circle is :-
[tex](x-a)^{2} + (y-b)^{2} = radius^{2}[/tex]
'a' means the x coordinate of the circle, 'b' means y coordinate of the circle.
In the question, it's given that the coordinates of the circle are (5, -8) and radius is 8cm.
So, 'a' will be 5 and 'b' will be -8
So,
[tex](x-5)^{2} + (y--8)^{2} = 8^{2}[/tex]
[tex](x-5)^{2} + (y+8)^{2} = 64[/tex]
[tex]x^{2} - 10x + 25 + y^{2} - 16y + 64[/tex]
[tex]x^{2} + y^{2} -10x -16y + 64 - 25[/tex]
= [tex]x^{2} + y^{2} -10x -16y + 39[/tex]
ACC Algebra 1 HW
Graphing inequalities has always been a subject that I've somewhat struggled on.
Answer:
y < x
Step-by-step explanation:
equation of line can be derived by finding slope and y-intercept
in this case the slope is 1 and the y-intercept is 0
equation is y = x
however, this is an inequality so answer is one of the following:
y > x or y < x
pick a point in the shaded region (these are the 'solutions'), let's pick (1, -1)
x = 1 and y = -1
which one is true? -1 > 1 or -1 < 1
-1 < 1 is the true one so inequality is y < x
A bakery sells mocha cupcakes and vanilla cupcakes. It sold 160 cupcakes in a day, and 65% of them were vanilla. How many of the cupcakes sold that day were mocha?
What percent of $40 is $35?