Answer:
$3.20
Step-by-step explanation:
I hope this helps.
Sorry if I'm wrong.
16. A radioactive isotope has a half-life of 13 hours. Find the amount of the isotope left from a 400-milligram
sample after 65 hours. If necessary, round your answer to the nearest thousandth.
a. 25 mg
c. 0.049 mg
b. 7.692 mg
d. 12.5 mg
Please help. I only see answers for 52 hours
Answer:
Without the math: 65 hours is 5 half-lives
13 hrs = 1/2
26 hrs = 1/4
39 hrs = 1/8
65 hrs = 1/32
(1/2)^5 = 1/32
400 mg / 32 = 12.5 mg that is, after 5 half-lives
y – 1.02 = 4.7
solve for y
Answer:
y=5.72
Step-by-step explanation:
Let's solve your equation step-by-step.
y−1.02=4.7
Step 1: Add 1.02 to both sides.
y−1.02+1.02=4.7+1.02
y=5.72
Answer: y=5.72
Step-by-step explanation:
4.7 plus 1.02 equals 5.72
5.72 minus 1.02 equals 4.7
5 hours on Monday, 4.5 hours on Tuesday, and 2.5 hours on Wednesday. What is the mean number of hours she worked over the three-day period?
Answer:
Mean = 4
Step-by-step explanation:
Mean = (Sum of all numbers)/(How many numbers there are)
There are 3 numbers
Mean = (5 + 4.5 + 2.5)/3
Mean = 12/3
Mean = 4
Answer:
[tex] \frac{5 + 4.5 + 2.5}{3 } = \frac{5 + 7}{3} = \frac{12}{3} = 4[/tex]
Help pls do all 10 points
Name the x-axis of symmetry for the parabola down below
Answer:
x = - 3
Step-by-step explanation:
The axis of symmetry is a vertical line passing through the vertex of the parabola with equation
x = c
where c is the value of the x- coordinates the line passes through
The line passes through (- 3, - 6), (- 3, 4 ) with x- coordinates - 3
Then equation of axis of symmetry is x = - 3
I need more answers and I don’t know how to make an account
Answer:
Well if your on chrome book sign out and select add person and make your new email and password and you have a new account.
Step-by-step explanation:
Hope this helps and have a wonderful day!!!
Answer:
Account for what, brain ly
Step-by-step explanation:
step 1: Go to sign up
step 2: create a email
step 3: create password
Write as a sum, difference or
multiple of logarithms.
In(8x) = [ ? ]8+ [ ]x
Answer:
In(8x)=[In]8 + [In]x
Step-by-step explanation:
By product rule:
[tex]In(8x)=[In]8 + [In]x[/tex]
Expand logarithm equation
Answer:
6log_4(x) - 4log_4(y)
Hannah’s Houseboats, which usually
charges $100 per night, is now offering a
discount. If you stay eight nights and pay a
total of $560, what percentage discount did
you receive?
Answer:
30%
Step-by-step explanation:
Since you paid 560 dollars for 8 nights, you can divide to see how much you pay one night. You pay 70 dollars per night. So 30% off from $100 is $70
Answer:
30 percent
Step-by-step explanation:
math
Find the area of the shaded region.
Answer:
[tex] 426.96 \: {km}^{2} [/tex]
Step-by-step explanation:
Area of the shaded region = Area of triangle with base 40 km and height 27 km - Area of circle with radius (12/2) 6 km.
[tex] = \frac{1}{2} \times 40 \times 27 - 3.14 \times {(6)}^{2} \\ \\ = 20 \times 27 - 3.14 \times 36 \\ \\ = 540 - 113.04 \\ \\ = 426.96 \: {km}^{2} [/tex]
Susan started the week with an odometer reading of 49,980 miles and a full tank. She ended the
week with an odometer reading of 50.230 miles. She re-filled her gas tank and put in 12 gallons of
gasoline.
How many miles per gallon did she get?
Answer
the answer is 21, hope this helps
Mya claims (m 23 +m24) = m_1, as shown in the triangle below.
3
1/2
4
Which equations explain why Mya's claim must be true?
Answer:it’s b
Step-by-step explanation:
3. (5 points) A company wishes to estimate the mean monthly electric bill. If the standard
deviation is $400, how large a sample is required to estimate the mean electric bill to within $100
with 98% confidence?
Answer:
9.304
Step-by-step explanation:
company wishes to estimate the mean monthly electric bill. If the standard
deviation is $400, how large a sample is required to estimate the mean electric bill to within $100
with 98% confidence?
Sample size, n = (Zcritical * σ) ÷ ME
σ = standard deviation ;
ME ≥ margin of error
α = 98% ; At 98% confidence level ;Zcritical = 2.326
n ≥ (2.326 * 400) / 100
n ≥ 930.4 / 100
n ≥ 9.304
n = 10
I am confused. I believe it is 5(x^2+2)=45
Here is the problem: 5 times the square of a number and 2 is 45.
Answer:
Step-by-step explanation:
Answer:
x=2.16/x= -4.16
Step-by-step explanation:
you must use quadratic formula if the solved equation cannot be factorised
NO LINKS I WILL REPORT!!! But help plsss Complete the following sentence. Triangles are congruent if they have the
same
A. size
B. shape and name
C. size and name
D. size and shape
E. shape
F. name
We know that, Congruent Triangles always have same size, angles and shape, just then only they are congruent to each other, by various criterions such as
1.) SAS 2.) AAS 3.) RHS 4.) SSS 5.) ASA
so the correct option is D.)
D.) size and shape
Who wants to do my aleks topics.... I will give you the account and password, yo the teacher really expects me to do 20 of them.
Answer:
Step-by-step explanation:
45 47
Use the graph at the right. Find the vertices of the image of QRTW for a dilation with center (0,0) and a scale factor of 5.
Answer:
What image? (9/ -0) Is 9 - 8 =1
Step-by-step explanation:
Answer:
you dont have the image of the graph.
Step-by-step explanation:
An uber charges a flat rate of $6 plus $1.25 per mile. Kayla can spend no more than $27.50. If she wants to tip her driver $4, what is the greatest number of miles she can uber? Define the Variable for situation #1 and write an equation or inequality that represents this situation using the variable
Answer:
The cost of the uber is a $6 flat rate plus $1.25 per mile.
Then if you take an uber for x miles, the cost will be:
c(x) = $1.25*x + $6
Now, in this case Kayla also wants to add a tip of $4, then the total cost will be:
c(x) = $1.25*x + $6 + $4 = $1.25*x + $10
And we have the restriction that Kalya can't spend more than $27.50
Then the cost must be equal or smaller than $27.50, we can write this as:
c(x) ≤ $27.50
$1.25*x + $10 ≤ $27.50
Whit the above equation we can find the maximum value of x if we isolate x in one side of the inequality.
$1.25*x + $10 ≤ $27.50
$1.25*x ≤ $27.50 - $10
$1.25*x ≤ $17.50
x ≤ ($17.50/$1.50)
x ≤ 11.67
So the maximum number of miles that she can travel on that uber is 11.67 miles, but in this cases we only work with whole numbers, so we should round it to the next whole number that meets the condition, which is 11.
x = 11
The maximum number of miles that she can travel on that uber is 11 miles.
mmmm i need help ....
Answer:
D
Step-by-step explanation:
Two numbers are multiplied together.
5 * 2/3
When you take the log, you get
log(5) + log(2/3)
log 2/3 is raised to the x power.
log(5) + log(2/3)^x
The x is a power and it can be taken down and multiplied by log(2/3)
log(5) + x log(2/3)
Answer:
D. log(5) + x • log(2/3)
Step-by-step explanation:
Hope this helps
Solve the following quadratic equation.
(x-16)^2=256
Answer:
x=32, x=0
Step-by-step explanation:
[tex](x-16)^2=256[/tex]
Take the square root of both sides
[tex]\sqrt{ (x-16)^2}=\±\sqrt{256}\\x-16=\±16[/tex]
x=16+16 or x=16-16
Therefore, x=32 or x=0
I hope this helps!
Answer:
x=32 and x=0
Step-by-step explanation:
Emma noticed that the new admission fee for a zoo is 65% more than last year’s fee. If f represents last year’s fee, which of the following expressions represent the new admission fee? Select all that apply.
Answer: 1.65f
Step-by-step explanation:
Last year's admission fee = f
Percentage Increase in the admission fee = 65%
New admission fee will be the addition of last year's admission fee and the increase in the admission fee. This will be:
= f + (65% × f)
= f + (65/100 × f)
= f + (0.65 × f)
= f + 0.65f
= 1.65f
The new admission fee is 1.65f
Could someone please help?
Answer:
1. 7% change increase
2. 27%change decrease
3. 39% change decrease
4. 29% change increase
Step-by-step explanation:
I hope this is right
Simplify :
(a+b)²
Thanks
Answer:
(a+b)(a+b)
=a^2 + ab + ab + b^2
=a^2 + 2ab + b^2
Answer:
(a+b)² = ( a +b ) (a + b )
= a² + b² + 2ab
Classify the following triangle. Check all that apply.
A. Obtuse
B. Acute
C. Isosceles
D. Right
E. Equilateral
F. Scalene
Answer:
C. Isosceles
E. Equilateral
F. Scalene
D. Right angled
ITS URGENT
find the missing length of the triangle.
HELPPPPP ME PLSSSSS I WOULD GIVE YOU BRAINIEST PLSSSS HELPP QUICK What is the slope-intercept equation of the line below?
y-intercept= (0, 3)
slope =-5/4
Answer:
y= -5/4 x+3
Step-by-step explanation:
like I said plug it in
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
Answer:
Cone: You need the radius and height of the cone.
Cylinder: You need the radius and height the cylinder.
Sphere: You only need the radius of the sphere.
Step-by-step explanation:
For a lot of object shapes height and radius play a large role, the sphere is an outlier because of it's for a lack of a better word, spherical shape.
) Which expression is equivalent to
- 7?
(0+21) 10-2
(21)
(6+21)
(6 - 21)
3
math question help pls
Answer:
Negative
Step-by-step explanation:
Hello There!
The points on the scatter plot show some sort of correlation as they are grouped closely enough to create a trend line ( a line drawn where most points are at. )
If you were to draw a line through the points, the line would have a negative slope as most of the points go down from left to right indicating that the correlation is negative
Jenna received a 17% tip from a customer. The customer's bill was $31.28. How much was Jenna's tip? Round to the nearest hundredth.
Answer:
Her tip was $5.32.
Step-by-step explanation:
To find the tip amount, all you need to do is multiply 31.28 by 17% (0.17).
Good Luck!
