4. What is the half-life of the radioactive isotope with amount A, whose rate of decay in t hours is shown in the graph below?
(0,40)
(20,15)
Answers
Answer:
15, 25
Step-by-step explanation:
Answer:The half life is the time taken for the amount of a substance to become half of its original value. If we take the initial value to be 30 on the y-axis, the half of 30 is 15. We check the time at which the substance has reduced to 15 atoms and this is about 40 seconds. The answer is C.
Step-by-step explanation:
Related Questions
I need help with this question
Answers
Answer:
2n=12
Step-by-step explanation:
The next step would be to subtract four from each side getting 2n=12 or B
HELPP QUICK PLSS :’( BEFORE I HAVE A BREAKDOWN NO BITS NO LINKS OR ANSWERS TO GET POINTS I REALLY NEED THE HELP AND CHOOSE MORE THAN ONE PLSS Which of the following equations describes the line shown below? Check all
that apply.
(-4, 10)
(-7,-5)
Answers
Answer:
a, c, d
Step-by-step explanation:
answers are A, C and D
27 is 76% of what number?
Answers
Answer:
35.53% is the answer
Step-by-step explanation:
Answer:
35.53
Step-by-step explanation:
hope it's helpful ...............
area of a regular hexagon with an apothem of 15 cm
Answers
Answer:
area = 779.4 cm²
Step-by-step explanation:
divide it into 6 equal equilateral triangles. Each corner of a triangle will be 60°.
tan 60° = 15/x
1.7321 = 15/x
x = 8.66 (this is one-half of the base of the triangle)
base = 17.32 cm
area of one triangle = 1/2(17.32)(15) = 129.9 cm²
129.9(6) = 779.4 cm² (because 6 triangles make up the hexagon)
Two boys each run 3 ½ miles for 4 days. How many total miles did they run?
Answers
Answer:
They ran 28 miles total!
Quick Step-by-step explanation:
3 1/2 = 3.5
3.5 x 4 = 14
14 miles per boy so then, 14 x 2 = 28
Hope this helps!
find the volume of the prism. write your answer as a decimal.
Answers
Answer:
161.21
Step-by-step explanation:
Elijah went to the store and bought a pack of note cards for $3.80. If the tax was 7%, how much did he pay for the note cards?
Answers
Answer:
4.066
Step-by-step explanation:
7% of $3.80 = 0.266
Tax = 0.266
0.266 + 3.80 = 4.066
Hope this helps!! Have a great day and remember, you are loved.
6
There are 20 sweets in a bag.
Seven of them are strawberry.
A sweet is taken at random from the bag.
What is the probability that the sweet taken is not strawberry?
Answers
The probability that a sweet taken at random from the bag is not strawberry would thus be 13/20.
a.( 18:32)
b.(6:36)
c.(9:21)
convert the following ratio to fraction in it's lowest from
Answers
Answer:
Step-by-step explanation:
18 in every 32 (people or whatever it is) 18/32 then simplify i believe
A group of scientists wants to investigate if they can predict the life expectancy of mammal species given
its average heart rate. The table below shows the relationship between average heart rate (in beats per
minute) and life expectancy (in years) for a sample of mammals.
Whale
Elephant
Horse
Lion
Sheep
Pig
Average heart rate (BPM)
20
30
34
50
75
95
Life expectancy (years)
70
70
40
13
15
25
All of the scatter plots below display the data correctly, but which one of them displays the data best?
By convention, a good scatter plot uses a reasonable scale on both axes and puts the explanatory variable on the
x- axis
Answers
Answer:
GRAPH B
Step-by-step explanation:
I GOT IT CORRECT ON KAHN!!!!
Please help I need to pass this
Answers
Answer:
153 units²
Step-by-step explanation:
Area of a Parallelogram: L x W (same as a rectangle)
L x W = A
17 x 9 = A
A = 153
help please i’ll really appreciate it
Answers
Answer: I believe its 64 cubic in
Step-by-step explanation:
AT HOME / STUDENTS
1. What are the two equations you created?
id to find 2. How did you put the equations into y=mx+b form?
3. Using your calculator, explain the steps that you did to find
the intersection point.
4. What is the answer?
Answers
What's the radius of the big cylinder?
Answers
Answer:
I think 56.52
Step-by-step explanation:
To find the radius you'll have to do C=2(3.14)(9)=56.52
pleaseee help
The answer choices for number 2 is and the answer choices for number 1 is in the photo
1. Has no relation
2. Is the vertical angle to the corresponding angle
3. Is the corresponding angle
4. Is an alternate exterior angle
Answers
What is the correct factorization of
5(x + 2) – 3x(x + 2)?
Answers
Joel has a 41 in board leaning up against a wall the board hits the wall 40 inch above the ground how far from the wall is the base of the board.
Answers
Answer:
9
Step-by-step explanation:
41^2 - 40^2 = 81
The square root of 81 is 9. I hope this helps.
Ramon paid $3.25 for notepads and $1.80 for markers.
how much of each item did he buy?
notepad cost: $0.65
markers cost: $0.36
Answers
How do I solve X/12+1/3=-5/3
Answers
Answer:
16
Step-by-step explanation:
x/12=5/3-1/3
x/12=4/3
3x=12×4
3x=48
x=16
Answer is in the picture attached
Can anyone help me with this geometry test please like I will do anything!! I will give brainlist!!
Also NO links!!
Answers
Answer:
It c
Step-by-step explanation:
If c is a positive number, how many solutions does √x = c have? Explain.
Answers
Answer:
varied
square root of number never result negative number
Step-by-step explanation:
There will only be one real solution.
If [tex]x[/tex] is a real number, the square root function [tex]\sqrt x[/tex] will only have real solutions when [tex]x\ge0[/tex].
For [tex]x<0[/tex], we get imaginary solutions.
Also, when [tex]\sqrt x> 0[/tex], [tex]x>0[/tex]
In other words, when the square root of [tex]x[/tex] is a positive real number, [tex]x[/tex] will be a unique positive number.
We can see this when trying to solve the equation given in the question
So, the equation
[tex]\sqrt x=c[/tex]
where [tex]c>0[/tex], when solved, will give
[tex]\sqrt x=c\\(\sqrt x)^2=c^2\\x=c^2[/tex]
We will have a unique solution because squaring a positive real number gives a single result.
Learn more here: brainly.com/question/24117016
Please answer this for me
Answers
Answer:
possibly z2-6 so try the third one
Step-by-step explanation:
Please help:(( no links please!!
The quadrilateral CONR on the coordinate plane has the following characteristics
The equations are in the photo
Answers
Answer:
A :
B : Trapezius!
............
Find the shaded area.
Round to the nearest tenth if necessary
Answers
Answer:
297 mm²
Step-by-step explanation:
22 mm × 18 mm = 396 mm²
(9 × 22) ÷ 2 = 99 mm²
396 mm² - 99 mm²
297 mm²
7n; n=5?
I have no idea what the answer is, please help.
Answers
Answer:
35
Step-by-step explanation:
7n;n=5
7n
n=5
7×5=
n=35
Answer:
35
Step-by-step explanation:
so 7n; n=5
substitute the "n" attached to 7 with 5
so it would be 7 times 5 which equals 35
Clarissa needs a $2,500 loan in order to buy a car. Which loan option would allow her to pay the least amount of interest?
Answers
Answer:
An 18-month loan with a 4.75% annual simple interest rate
Step-by-step explanation:
I hope this helps u! :D
Answer:
18 months loan and with a 4.75% annual simple interest rate
Step-by-step explanation:
Find the number of terms for this polynomial - 17x ^ 5 + 17x ^ 3 - 18
Answers
Answer:
I love algebra anyways
the ans is in the picture with the steps
(hope it helps can i plz have brainlist :D hehe)
Step-by-step explanation:
Answer:
−1(175−173+18) (that sould be the solution)
Hope that helps
I’m lazy:) I’ll give brainliest
Answers
Answer:
its 5.795
Step-by-step explanation:
Answer:
5.790
Step-by-step explanation:
all zeos at the top
The height (ft) of an object is launched into the air given by the function h(t)=-6t^2+120t+17 where t is the time in seconds.
When will the obj reach its maximum height ?
What is the max height?
After how many seconds will it hit the ground?
Answers
Answer:
Object will reach the max height in 10 seconds.
Max. height is 1817.
It will hit the ground in 20 seconds.
Step-by-step explanation:
In order to find the x value which makes the function take its greatest value, you need to take the derivative of the function and equalize the result to 0.
h'(t)=-12t+120=0
t=10
The object will reach its maximum height in 10 seconds.
h(10) (maximum height) = 6.10.10+120.10+17= 600+1200+17=1817
Considering this is a parabola, time in total is two times more than the time passed until reaching the max. height.
10.2=20
Which of the following could be the number shown on the number line?
Answers
Answer:
I believe your answer would be C. square root of 67
Step-by-step explanation:
If 8 is the square root of 64 and the missing number is just over 8, square root of 72 would be too much and A. and D. would be too little. I do deeply apologize if this is incorrect.
