Step-by-step explanation:
pi r 2 = 4 pi ^2
then r^2 =4pi
r =2√pi
now circumference of circle = 2pi r
= 2pi 2√pi
= 4 pi √pi
4pi ^2 by √pi
To build a garden bed, James bought 36 feet of wood. If he makes the length of the garden 10 feet, what will the width be?
10*2 = 20
36 - 20 = 16
16 / 2 = 8
Answer is 8
HELP IM ALMOST DONE!!!!!!!!!!!!!!!!!!!!!!! PLS ILL GIVE BRAINLLIEST
Answer:
312mm^2
Step-by-step explanation:
A sample of a radioactive isotope had an initial mass of 360 mg in the year 1998 and
decays exponentially over time. A measurement in the year 2004 found that the
sample's mass had decayed to 270 mg. What would be the expected mass of the
sample in the year 2011, to the nearest whole number?
Answer:
193 mg
Step-by-step explanation:
Exponential decay formula:
[tex]A_t = A_0e^r^t[/tex]where Aₜ = mass at time t, A₀ = mass at time 0, r = decay constant (rate), t = timeOur known variables are:
1998 to the year 2004 is a total of t = 6 years.The sample of radioactive isotope has an initial mass of A₀ = 360 mg at time 0 and a mass of Aₜ = 270 mg at time t.Let's solve for the decay constant of this sample.
[tex]270=360e^-^r^(^6^)[/tex][tex]270=360e^-^6^r[/tex] [tex]\frac{3}{4} =e^-^6^r[/tex][tex]\text{ln} (\frac{3}{4} )= \text{ln}(e^-^6^r)[/tex] [tex]\text{ln} (\frac{3}{4} )=-6r[/tex] [tex]r=-\frac{\text{ln}\frac{3}{4} }{6}[/tex] [tex]r=0.04794701[/tex]Using our new variables, we can now solve for Aₜ at t = 7 years, since we go from 2004 to 2011.
Our new initial mass is A₀ = 270 mg. We solved for the decay constant, r = 0.04794701.
[tex]A_t=270e^-^(^0^.^0^4^7^9^4^8^0^1^)^(^7^)[/tex] [tex]A_t=270e^-^0^.^3^3^5^6^2^9^0^7[/tex][tex]A_t=193.01982213[/tex]The expected mass of the sample in the year 2011 would be 193 mg.
Match the Letter and Number. I need help ASAP
1. Ellipse
2. Circle
3. Sphere
4. Great circle
5. Triangle
A. perpendicular cross section of a cone
B. cross section parallel to the base of a cone
C. shape created when a semi-circle is rotated about the y-axis
D. diagonal cross section through the widest part of a sphere
E. diagonal cross section of a cylinder
Answer:
The correct matches are as follows:
1. Diagonal cross section of a cylinder
c.ellipse
2.Cross section parallel to the base of a cone
d.circle
3.Shape created when a semi-circle is rotated about the y-axis
e.sphere
4.Diagonal cross section through the widest part of a sphere
b.great circle
5.Perpendicular cross section of a cone
a.triangle
Hope this answers the question. Have a nice day.
Step-by-step explanation:
HELPPPPPPPP PLEASEEEEEEE!!!!!!!
Answer:
false
Step-by-step explanation:
it's false negative
16-2t=5t+9?????????????????????????????????????
Answer:
t=1
Step-by-step explanation:
16-2t=5t+9 (add 2t)
16=7t + 9 (subtract 9)
7=7t (divide 7)
t=1
Answer:
t=1
Step-by-step explanation:
step one : rearrange terms
16−2=5+9
−2+16=5+9
step two: subtract 16 from both sides of the equation
−2+16=5+9
−2+16−16=5+9−16
step three: simplify
−2=5−7
step four:Subtract 5t from both sides of the equation
−2=5−7
−2−5=5−7−5
step five: combine like terms
−7=−7
step six: divide
−7 /−7 =−7/−7
Need help with this please
Answer:
These are kinda tuff Mandi, sooo remember what's below
Step-by-step explanation:
Use SOH CAH TOA to recall how the trig functions fit on a triangle
SOH: Sin(Ф)= Opp / Hyp
CAH: Cos(Ф)= Adj / Hyp
TOA: Tan(Ф) = Opp / Adj
now fine one of the above functions that has the 3 things you are working with. 2 knowns, and 1 unknown
also we know that the angle at the right tip of the triangle is 90-59= 31°
we know that b/c the inside angles of a triangle always add to 180 and there is already a 90° so we only have 80 left, which the 59° is part of, so 31 is the other, now put that info into one of the above formulas
x= adjacent side
and we know the angle and hypotenuse side. find the formula with those parts. I see Cos has those or CAH... to help remember how those fit
Cos(31) = x / 17
17*cos(31) = x
14.5718 = x
there is your answer, understand how I got it? :)
x+(y+1) divided by 5
Answer:
uhm so you'd assume y is more than 5 so maybe try x +(7+1) /5
now do x + 8 /5. x must be like 7 so
x= 7 and y= 7 so it is 7 + (7+1) divided by 5 which is 3 I believe
simplifying it just as is is more like x + (y+1) / 5
your welcome :3
Step-by-step explanation:
2.2.2 A woman has a mass of 350lb. what is the mass in kg?
Answer:
158.757
Step-by-step explanation:
look it up
Answer:
Step-by-step explanation:
1 kg = 2.205 lb
350 lb × (1 kg)/(2.205 lb) = 157.8 kg
HELP!!!!! PLZ ANSWER FAST
Find the midpoint between -5 and 37
Answer:
16
Step-by-step explanation:
Midpoint = (5+37) / 2 - 5
This is a weird question because it has a negative number but just think of it as adding the positive value and finding the midpoint, then subtracting the value. Draw a number line to help visualize this too.
A person invests 2000 dollars in a bank. The bank pays 4.75% interest compounded
quarterly. To the nearest tenth of a year, how long must the person leave the money
in the bank until it reaches 3500 dollars?
A = P(1 + + ?.)nt
n
00
Answer:
Submit Answer
Answer:
t = 2.7
Step-by-step explanation:
1. Use formula provided
2. A = 3500 B = 2000 r = 4.75 n = 12months/4 = 3 months t = ?
3. Solve
3500=2000(1+4.75/3)^3t
3t=logbase(31/12)*1500
t=logbase(31/12)*1500 / 3
t ≅2.568
Answer:11.9
Step-by-step explanation:
Help plz!!!!!!!!!!!!!!!?
Answer: step 2
Step-by-step explanation:
5 - 2 (4а + 1) - За - 13 I need help
Answer:
-11a - 10
Step-by-step explanation:
simplify in order of terms: -2(4a + 1) - 3a - 13 + 5
simplify: -8a - 2 - 3a - 8
simplify again: -11a - 10
In the figure below, MN | KL and are intersected by transversals ML and KN M 1551 What is the measure of , XMN?
130°
85°
55°
50°
Answer:
∠ XMN = 50°
Step-by-step explanation:
∠ XNM and ∠ XKL are alternate angles and are congruent, then
∠ XNM = 35°
The sum of the 3 angles in a triangle = 180° , so
∠ XMN = 180° - (95 + 35)° = 180° - 130° = 50°
Help I have 10 minutes left
55
15x + 5
8
09
0.7
O 3,3
A scooter costs $160. A bicycle costs 20% more than the scooter. How much does the bicycle cost? ?
Answer:
$192
Step-by-step explanation:
160 = 100% or 1.00
20% = 0.2 + 1.00
= 1.20
160 x 1.20 = $192
Answer:
$192
Step-by-step explanation:
$160 + 20% = $192
Find the value of x
Giving branliest to first answer
Answer:
I guess the answer is 144
12x^2-36x=0 solve for x
solve for x
Answer:
x = 0 or x = 3
Step-by-step explanation:
This is a quadratic equation, but because the constant term is zero, we can speed up the solution by factoring 12x^2 - 36x = 0:
12(x^2 - 3x) = 0, or
12(x)(x - 3) = 0
Thus, either x = 0 or x = 3
Qual o número que subtraído de 27 resulta em 54 negativos?
Translation (For those that don't know Spanish):
Which number that subtracted from 27 results in negative 54?
Find the value of x. Round to the nearest tenth if needed.
Find the volume of the triangular prism. 32 cm 7 cm 4.8 cm
Answer:
53.76
Step-by-step explanation:
B x W x H and divide by two is your answer.
Okay last question, please someone help me !
Answer:
hey mate!!
Step-by-step explanation:
-28 is the answer
Answer:
-28
Step-by-step explanation:
Determine the slope of the line that passes through the points (-1,7) and (2,9)
Answer:
y=2/3x+23/3
check image
Geometry Angle of elevation/depression
Answer:
m∠ACB = 49.88°
Step-by-step explanation:
From the figure attached,
Measure of wire AC attached to the top 'C' of the building BC = 340 m
Horizontal distance between the base 'B' of the building and point A = 260 m
Angle of depression = ∠ACB
By applying sine rule in the given triangle,
sin(∠ACB) = [tex]\frac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]
= [tex]\frac{AB}{BC}[/tex]
= [tex]\frac{260}{340}[/tex]
m∠ACB = [tex]\text{sin}^{-1}(764706)[/tex]
= 49.88°
Please help?
What is the period?
A. 1440
B. 360
203/4108 as a percent
a. 4.94%
b. 20.24%
c. 0.049%
d. 49.42%
What is the value of x in the figure below?
(3x + 8):
35
9
=|ო
45
WN
O
81
Answer:
c?
Step-by-step explanation:
Production shows that only 3 of the first 10 phones are working which is 30% of the phones describe how the percentage other working phones changes if the 11th and 12th phone won't work correctly
Answer:
If you have 10 phones, this is the 100%
then:
10 = 100%
Now we know that only 3 of them work correctly, then the percentage of pones that works correctly can be related to:
3 = X%
To find the value of X%, we can take the quotient of the equations:
3 = X%
and
10 = 100%
We ge:
(3/10) = (X%/100%)
We solve this for X and we get:
(3/10)*100% = X% = 30%
As we already know.
Now let's see how this percentage changes if we add more phones that do not work correctly.
Now we add another phone that does not work, so we have a total of 11 phones and 3 of them work.
then:
3 = X%
11 = 100%
The quotient is:
(3/11) = (X%/100%)
(3/11)*100% = X% = 27.3%
If we add another phone, now we have 12 phones and only 3 of them works, then 12 is the 100%, and we have the equations:
3 = X%
12 = 100%
Then we get:
(3/12) = X%/100&
(3/12)*100% = X% = 25%
Someone help and please make sure it’s right
Answer:
20°
Step-by-step explanation:
Look at the attached photo.
∠a and ∠e are equal because they are vertical angles.
So, m∠a = 110°
Then, ∠f is an exterior angle to angles a and c. So,
m∠f = m∠a + m∠c
Substitute and solve.
130 = 110 + m∠c
m∠c = 20°
Then, ∠c and ∠d are vertical angles so they are equal.
m∠c = m∠d
m∠d = 20°
I hope this helps! Feel free to ask any questions!
Help pleaseeeeeeeeeeee
Answer:
I think It's (A)
Step-by-step explanation:
Sorry if it's wrong