Complete question :
Swim team Hanover High School has the best women’s swimming team in the region. The 400- meter freestyle relay team is undefeated this year. In the 400-meter freestyle relay, each swimmer swims 100 meters. The times, in seconds, for the four swimmers this season are approximately Normally distributed with means and standard deviations as shown. Assuming that the swimmer’s individual times are independent, find the probability that the total team time in the 400-meter freestyle relay is less than 220 seconds. Follow the four-step process
Answer:
0.225
Step-by-step explanation:
Given the data:
Swimmer__ Mean __Std. dev.
Wendy ___ 55.2 ____ 2.8
Jill _______ 58.0 ____ 3.0
Carmen____56.3 ____ 2.6
Latrice_____54.7_____2.7
Team average = (55.2 + 58 + 56.3 + 54.7) = 224.2
Team standard deviation = (2.8 + 3 + 2.6 + 2.7) = 11.1
Standard Error = 11.1 /sqrt(n)
Standard Error = 11.1 / sqrt(4)
Standard Error (S. E) = 11.1 / 2 = 5.55
P(x < 220) :
(x - mean) / S.E
(220 - 224.2) / 5.55
= −0.756756
P(Z < - 0.757) = 0.22452
P(Z < - 0.757) = 0.225
Answer:
its B
Step-by-step explanation:
8j + 3-j=17
solve for J
write standard form equation of the circle on the graph (easy)
Answer:
The correct answer is D.
Go to your calculator or a graphing website and just graph it.
Answer:
(x-4)²+(y-2)²=9
Step-by-step explanation:
The standard form for a circle is (x-h)²+(y-k)²=r²
(h,k) is the center of a circle and r is the radius
h=4
k=2
r=3
(x-4)²+(y-2)²=3²
(x-4)²+(y-2)²=9
Simplify
21x®y:
14x’yº
PLEASE HELPPPP
Answer:
3x/2y
Step-by-step explanation:
i hope this helped you!! :)
I need to solve this with substitution and have it in an ordered pair... help!
i believe the correct answer is:
(-88, 3)
tell me if this is wrong
Answer:
(-88,3)
Step-by-step explanation:
Factor completely:
x^3 - x^2 - 6x
Answer:
[tex]x(x-3)(x+2)[/tex]
Step-by-step explanation:
1. Find the GCF (Greatest Common Factor)
[tex]GCF=x[/tex]
2. Factor out the GCF and simplify.
[tex]x(x^{2} -x-6)[/tex]
3. Factor [tex]x^{2} -x-6.[/tex]
Which two numbers add up to -1 and multiply to -6?
-3 and 2
Rewrite the expression using the numbers above.
[tex](x-3)(x+2)[/tex]
4. Done!
[tex]x(x-3)(x+2)[/tex]
Please anything helps
Answer:
D- Neither graph is a funvtion.
Step-by-step explanation:
A function can only have one input to one output. These have more than one output for each input. You can also do the vertical line test, if it touches more than two points at the same time while going horizontally across, it is not a function.
The slope of the minute hand on an analog clock is given by the expression cot(π/30 t), where t is time in minutes. Which of the following best represents the first time when the slope is 0.5?
-9.7 min.
-10.0 min.
-10.3 min.
-10.6 min.
Answer:
10.6 minutes.........
Ichiro bought 5 candy bars for $5.50. How much would he pay if he bought 9 candy bars
A. $9.90
B.$ 1.10
C.$27.50
Answer:
A
Step-by-step explanation:
Each candy bar is $1.10
Does Anybody know this ?
Answer:
897.63 hi hi hihi hi hi hi hi hi hi
Answer:
860$
Step-by-step explanation:
amount of money he earn per hour: 10.75$
No. of hours he worked this week: 33 hours
no. of hours he worked next week: 47 hours
total hours he worked: 33+47 = 80
now,
total amuont of money he makes= 10.75×80
860 $
The art club has a goal to raise at least $500 by selling paintings to the student body for $15 each. They have already spent $70 buying paint. Which inequality could be used to find the number of paintings the art club needs to sell to reach their goal?
Answers
A.15x - 70 ≤ 500
B. 15x – 70 ≥ 500
C. 70x – 15 ≤ 500
D. 70x – 15 ≥ 500
Answer:
choice b is correct
Help me please !!!!! It’s urgent
Estimate 72.91 + 67.526 by first rounding each number to the nearest whole number
Answer:
141
Step-by-step explanation:
First, you would round 72.91 to 73 because the number to the right of 7 is greater than or equal to 5, so you would round up. Same goes for 67.526. round both up to 73 and 68 then add. You would get an answer of 141 :)
Answer: 141
Step-by-step explanation: By rounding up to the nearest whole number, that is taking 72.91 -> 73. The reason it is this way is that when a decimal is past 0.5, you round up. If a decmial is below 0.5, then you round down.
In this specific situation, we get the numbers 72.91 and 67.526.
As I explained, the numbers would round up because both numbers decimal values are above 0.5.
So after 72.91 is 73, and after 67.526 is 68.
68 + 73 =
141
hopefully I helped!
If x=7cm what is the surface area of the geometric shape formed by this net
For what value of x do the expressions 2x+3 and 3x−6 have the same value?
The answer selected is my answer. Is it wrong. Tell me and the right answer and you will be the brainest answer also please quick due at 7:15am. Please make sure you know what you are doing because a I have missed a lot of these because people thought they could do it but they couldn't. I will take the best answer.
Answer:
WAAIITTTTT
THE ANSWER IS 4 AND 3
ANGLE 4 AND 3 ARE COMPLEMENTARY
hope it helps you
may you get good grades !!
If f(x)=-4x^2-6x-1 and g(x)=-x^2-5x+3, find (f-g)(x).
Answer:
(f-g)(x)=f(x)-g(x)=-4x^2-6x-1 -(-x^2-5x+3,)
=-4x²-6x-1+x²+5x-3
=-4x²+x²-6x+5x-3-1
=-3x²-x-4
2. 7x – 3 = 7x + 5
Help.?
my answer is;
X = - 80/43
pls help this is due today
Answer: .5/.25=2
Step-by-step explanation:
Question 3(Multiple Choice Worth 1 points)
(03.06 LC)
Determine if the sequence is arithmetic or geometric, and find the common difference or ratio.
X
1
2
3 4
f(x) 81 72 63 54
O Arithmetic, common difference = 9
O Arithmetic, common difference = -9
O Gealmetric, common ratio = 9
Geometric, common ratio = -9
Answer:
O Gealmetric, common ratio = 9
Step-by-step explanation:
5. Find the slope of a line perpendicular to the graph of the given equation:
y = 2/7x + 1
-7/2
2/7
-2/7
7/2
Answer:
2/7
Step-by-step explanation:
Slope is the number in front of the x
A group of friends ordered 3 burgers and 3 medium fries for a total of $20.25. Another group of friends ordered 5 burgers and 8 medium fries for a total of $38.25. What is the cost of one burger
Answer:
2.25
Step-by-step explanation
1. divide 20.25 by 3.
2. you got 6.75!
3. divide 6.75 by 3.
4. you got 2.25!
see how the power of division can help you? ok ok, sorry that's cringy.
The quotient of z and 8
8z
so apparently my answer need to be more than 20 characters long
Due in 5 minutes!!!!!!
Answer:
Pls send a more clearer picture
Step-by-step explanation:
What is d = -12t + 96 ?
Answer:
t = 8 - 1/12d
Step-by-step explanation:
tell me if this is wrong
.A radio station sends a signal in a circular
area with an 80-mile radius. Find the
approximate area in square kilometers that
receives the signal. (Hint: 1 square mile z
2.6 square kilometers)
Answer:
52,249.6
Step-by-step explanation:
HELP HELP ASAP PLEASE
What is the LCM of 24 and 90?
24,48,72,96,120,144,168,192,216,240,264...360
90,180,270,360
LCM of 24 and 90 is 360
---
hope it helps
Answer:
Step-by-step explanation:
Find the prime factorization of each number
24=2*2*2*3, 90=2*3*3*5
The LCM will be the product of highest occurring primes, in this case
2*2*2*3*3*5=360
So the LCM is 360
i need help i keel putting in the correct answer and it says it wrong
Answer:
Hi how are you doing today Jasmine
Answer:
36cm^2
Step-by-step explanation:
12 x 4 = 48
9 * 4 =36
36/3 =12
48 - 12 = 36
10. Find the vertex, domain and range from the function y = = 2|x|
a V(2,0), Domain: x E R, Range: y E (00, 2]
b V(0,2), Domain: x E R, Range: y € [2,00)
C V(0,0), Domain: x E R, Range: y € (0,0]
d V(0,0), Domain: x E R, Range: y € [0, 0)
Check it
skip
Find the surface area of the rectangular prism.
8 m
4 m
1 m
Answer:
A=2(wl+hl+hw)
Step-by-step explanation: