Answer: 1/5
Step-by-step explanation:
Can someone plz help me with this asap I would really appreciate it
A bacteria colony grow at a rate of 11% per year. If the initial sample has a mass of 500 grams,
which of the following functions models the size of the colony in grams t years later?
A) f(t)=500(.89)^t
B) f(t)=500(1.11)^t
C) f(t)=11(500)^t
D) f(t)=11(1.5)^t
Which of the following explains the role of Pi (1) in finding the circumference of a circle?
А
Pi is the ratio of the radius of a circle to the diameter of a circle.
B
Pi is the ratio of the radius of a circle to the circumference of a circle.
С
Pi is the ratio of the diameter of a circle to the circumference of a circle.
D
Pi is the ratio of the circumference of a circle to the area of a circle.
Answer:
The answer is C, The use of Pi can be used to find the ratio of the diameter and circumference of a circle
Step-by-step explanation:
Find the area of the triangle.
The area is = yd
(simplify your answer)
Answer:
472.5
Hope this helps
Someone answer and explain ILL MARK BRAINLIEST!!!!!!!!!!!!!
Answer:
Step-by-step explanation:
Answer:
Just explained a while ago
Step-by-step explanation:
How many solutions does the system have?Explain
Y=2x+3
-4x+2y=8
Please anyone help !?
want to learn symmetry?
Answer:
yes
Step-by-step explanation:
Answer:
i dont know maybe
Step-by-step explanation:
idc
Rewrite each subtraction equation as an addition equation.
p - 20 = - 30
Answer:
p + 30 = 20
Step-by-step explanation:
we can add 30 to both sides to make this an addition equation:
p - 20 = -30 (now add 30 to both sides)
p - 20 + 30 = 0 (then, add 20 to both sides)
p + 30 = 20 (this would be the addition equation)
f(x)=[tex]\sqrt{x^2-4}[/tex], x[tex]\leq \}[/tex]0
find [tex](f^-^1)'(1)[/tex]
I keep getting the wrong answer. The correct answer is[tex]\frac{1}{\sqrt{5} }[/tex]
Solve for x when √(x ² - 4) = 1 :
√(x ² - 4) = 1
x ² - 4 = 1
x ² = 5
x = ±√5
We're looking at x ≤ 0, so we take the negative square root, x = -√5.
This means f (-√5) = 1, or in terms of the inverse of f, we have f ⁻¹(1) = -√5.
Now apply the inverse function theorem:
If f(a) = b, then (f ⁻¹)'(b) = 1 / f '(a).
We have
f(x) = √(x ² - 4) → f '(x) = x / √(x ² - 4)
So if a = -√5 and b = 1, we get
(f ⁻¹)'(1) = 1 / f ' (-√5)
(f ⁻¹)'(1) = √((-√5)² - 4) / (-√5) = -1/√5
The sign must be negative; see the attached plot, and take note of the negatively-sloped tangent line to the inverse of f at x = 1.
Fill in the blanks: for a and b
Answer: b for a sorry that’s all I Could understand
Step-by-step explanation:
A cylinder has a height of 5 feet and a radius of 2 ft.
If a scale model of the cylinder is scaled up by a factor of 3, what is the surface area of the model?
756.20 ft.
791.68 ft.
832.05 ft.
865.28 ft.2
Answer:791.68
Step-by-step explanation:
2*pi*6^2 + 15 *pi * 12 = 791.68
what is 3/4 years converted into months.
Step-by-step explanation:
9 months
answer:
9 months
step-by-step explanation:
honestly this problem isnt super super complicated as we need to do is use some multiply tables! :)
since we know that
4*3
= 12
and in this problem
1/4
just means
= 3 months
so
3*3
= 9 months
hope this helps you! :)
Please help me with this.
9514 1404 393
Answer:
45 or 155
Step-by-step explanation:
At a speed of 11 units per minute, in 5 minutes the bug will run 5×11 = 55 units.
If the bug is running in the positive direction, it will end at location ...
100 +55 = 155
If the bug is running in the negative direction, it will end at location ...
100 -55 = 45
At 7:20 pm, the bug will be on the point 45 or 155.
4w2 + 3w - 1
5w - 2
Area
Answer:
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mrow>
<mi>w</mi>
</mrow>
<mrow>
<mn>2</mn>
</mrow>
<mo>=</mo>
<mo>−</mo>
<mrow>
<mn>5</mn>
</mrow>
<mfrac>
<mrow>
<mi>w</mi>
</mrow>
<mrow>
<mn>4</mn>
</mrow>
</mfrac>
<mo>+</mo>
<mfrac>
<mrow>
<mn>1</mn>
</mrow>
<mrow>
<mn>2</mn>
</mrow>
</mfrac>
</math>
Step-by-step explanation:
Graph the linear equation.
There are 12 members of a basketball team. In how many ways can they choose 2 captains.
Answer:
66
Step-by-step explanation:
hope this help an i will not ask if anyone a boy or girl.
Determine the area of the figure shown. Use paper to show your work. Note that each square unit is one unit in length The area of the figure is units2.
Answer:
Step-by-step explanation:
MATH DETECTIVE:
Clue 1) I am a negative integer greater than -6.
Clue 2) I am less than -2.
Clue 3) I am not equal to -2 + (-1).
Clue 4) I am not equal to 2 - 6.
Who am I??
HELPPP ME PLEASEEEEEE
Answer:
- 5
Step-by-step explanation:
"I am a negative integer greater than -6."
This eliminates any number that is less than -6, as well as any positive number.
0 > x > -6
"I am less than -2."
This narrows down the possible numbers to:
-5, -4, -3.
"I am not equal to -2 + (-1)"
-2 + - 1
-2 - 1
- 3
The number is not '-3'.
"I am not equal to 2 - 6."
2 - 6
- 4
The number is not -4.
Your number should be -5.
Hope this helps.
please help find the values of a,b,c
9514 1404 393
Answer:
a = 3b = 4c = 2d = 1Step-by-step explanation:
There are zeros at x=-1 and x=4, so numerator factors of (x +1) and (x -4).
There are vertical asymptotes at x=1 and x = -2, so denominator factors of (x-1) and (x+2).
There is a hole at x=-3, so another numerator factor of (x+3) to cancel the one in the denominator.
Comparing the above to the given expression for f(x) we see that ...
a = 3b = 4c = 2d = 1Find the following rates. Round your answer to the nearest hundredth. a. ? % of 75 = 5 b. ? % of 28 = 140 c. ? % of 100 = 40 d. ? % of 200 = 15
Answer:
a. ? % of 75 = 5 = 15
b. ? % of 28 = 140 = 500
c.? % of 100 = 40 = 40
d.? % of 200 = 15 = 7.5
Hope it helped...
Have a great day : )
Is Figure B a scale copy of Figure A?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~A: Yes
B: No
Answer:
A
Step-by-step explanation:
The difference between two numbers is 4. If twice the larger number x is equal to three more than three times the smaller number y, what is the value of 2x + 3y?
A witness identified a suspect as having blond hair. However, when tested under lighting conditions similar to those on the night of the incident, it was concluded that the probability of correctly identifying blond hair was 0.90 and the probability of being incorrect about non-blond hair was 0.2. Suppose that 0.4 is the proportion of persons with blond hair that live in the area. Let two events A and B be defined as A = [ Identified as blond and B = [ Person is blond] 1. Fill in the four probabilities, and the marginal totals, in the two-way table. using... (A, B, Not A, Not B) 2. Given that this person was identified as blond, find the probability of being blond 3. Make a Venn diagram to display the relations among these two events.
Answer:
To get the table we have to find the following probabilities
p(A), p(B), p(not A), p(not B)
A = suspect has blond hair
B = suspect is blond
p(B) = 0.4
probability of identifying correctly = AIB = 0.90
prob of wrongful identification = AlB' = 0.2
Probability of A = p(AIB) *p(B) + p(AIB')*p(B')
= 0.9 * 0.4 + 0.2 *(1-0.4)
= 0.48
p( not A) = 1-0.48 = 0.52
p(not b) = 1-0.40 = 0.6
the table has been added as an attachment
2. probability of being blond = 0.9 * 0.4 / 0.48 = 0.75
3. p(A∩B) = 0 .90 * 0.4 = 0.36
the venn diagrams an attachment also
Two teams, A and B, are about to play a game. Previous records show that A has an 80% chance of winning, while B has a 20% of winning. Spectators can either choose to buy regular tickets or special tickets. A spectator with a special ticket will receive a refund of $2 if team A wins and a refund of $5 if team B wins. How much extra, minimally, should the special ticket cost to cover the expected value of the refunds offered?
A. $16.00
B. $2.60
C. $26.00
D. $3.00
E. $10
Answer:
b
Step-by-step explanation:
plato/edm fammm lol
What is the equation of the line that has a slope of 4 and passes through the point (4,1)
Answer:
B
Step-by-step explanation:
y-y1=m(x-x1)
y-1=4(x-4)
A house blueprint has a scale of 1in : 10ft the length and width of each room in the actual house are shown in the table complete the table by finding the length and width of each room on the blueprint
Help me with this one
Answer:
30x40=3inx4in
50x50=5inx5in
40x20=4inx2in
30x40=3inx4in
30x30=3inx3in
35x40=3.5inx4in
Step-by-step explanation:
Phone calls to New York are charged at the rate of £2.90 for a 5-minute call. John’s call costs £7.86. How long (in minutes) was his call?
Answer:
Step-by-step explanation:
5 min = 2.90
xmin = 7.86
with cross multiplication;
xmin = 7.86*5min/2.90
x = 13.55=14.0
therefore x = 14min
so he will make of 14min long
Rose went to the craft store to buy beads to make bracelets. Each bag of beads cost $4.59. Which equation can be used to find the y, rose's total purchase price when she buys x bags of beads?
Answer:
pp
Step-by-step explanation:
lol
lol
a right cone has a radius 3 and slant height 5. the radius and slant height are both multiplied by 3/2. describe the effect on the surface area
Answer:
The surface area is multiplied by 4/9.
Step-by-step explanation:
you welcomeeeeeeeeeeeeeeeeeeeeeeeee
First lets find the surface area of cone without effect
Given:
Radius of cone = 3 units
Slant height of cone = 5 units
To find:
Surface area of cone
Steps:
Surface area of a cone = πr (r + l)
= π × 3(3 + 5)
= π × 3 (8)
= π × 24
= 24π unit²
Now lets find the surface area of cone with effect
Given:
Radius of cone = 3 × 3/2 = 9/2 = 4.5 units
Slant height of cone = 5 × 3/2 = 15/2 = 7.5 units
To find:
Surface area of cone
Steps:
surface area of cone = πr(r + l)
= π × 4.5( 4.5 + 7.5 )
= π × 4.5( 12 )
= π × 54.0
= 54π
Since we know the surface area of the cones before and after affect now lets find effect
Given:
Surface area of cone before affect = 24π
Surface area of cone after affect = 54π
To find:
Effect on the surface area of cone before and after change
Steps:
By dividing the surface area of cone after and before affect will give us the effect on the cone
54π / 24π
= 54/24 (pi gets canceled out)
= 27/12
= 2.25
Therefore the area of cone is multiplied by 2.25 after effect.
Happy to help :)
If you need any help, please feel free to ask.
A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He believes that the mean is 12.6. Assume the variance is known to be 3.61. How large of a sample would be required in order to estimate the mean number of reproductions per hour at the 95% confidence level with an error of at most 0.19 reproductions
Answer:
A sample of 385 is needed.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.95}{2} = 0.025[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.025 = 0.975[/tex], so Z = 1.96.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population, which is the square root of the variance, and n is the size of the sample.
Assume the variance is known to be 3.61.
This means that [tex]\sigma = \sqrt{3.61}[/tex]
How large of a sample would be required in order to estimate the mean number of reproductions per hour at the 95% confidence level with an error of at most 0.19 reproductions?
A sample of n is needed.
n is found when [tex]M = 0.19[/tex]. So
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
[tex]0.19 = 1.96\frac{\sqrt{3.61}}{\sqrt{n}}[/tex]
[tex]0.19\sqrt{n} = 1.96\sqrt{3.61}[/tex]
[tex]\sqrt{n} = \frac{1.96\sqrt{3.61}}{0.19}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.96\sqrt{3.61}}{0.19})^2[/tex]
[tex]n = 384.16[/tex]
Rounding up
A sample of 385 is needed.