Answer:
(8.213 ; 8.247)
Step-by-step explanation:
Given the data :
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Dia. 8.23 8.16 8.23 8.25 8.26 8.23 8.20 8.26 8.19 8.23 8.20 8.28 8.24 8.25 8.24
Sanple size, n = 15
Sample mean, xbar = Σx / n = 123.45 / 15 = 8.23
The sample standard deviation, s = √(x -xbar)²/n-1
Using calculator :
Sample standard deviation, s = 0.03116
s = 0.031 (3 decimal places)
The 95% confidence interval :
C.I = xbar ± (Tcritical * s/√n)
Tcritical at 95%, df = 15 - 1 = 14
Tcritical = 2.145
C.I = 8.23 ± (2.145 * 0.031/√15)
C.I = 8.23 ± 0.0171689
C.I = (8.213 ; 8.247)
Now THAT's a problem !
Lemme at it ! Outa my way !
The probability of picking two of the friends to work together is
(the number of pairs of friends there are)
divided by
(the total number of pairs that can be pulled out of 21 students).
The number of pairs of friends there are is (3 x 2) / 2 = 3 pairs.
The total number of pairs that can be selected out of 21 students is
(21 x 20) / 2 = 210 pairs.
The probability that the pair selected will be two of the friends is
3 / 210 = 1/70 = about 1.43 % (rounded)
Answer:
1.875ml
Step-by-step explanation:
De la pregunta anterior, podemos decir que:
80 mg = 3 ml
50 mg = x ml
Cruzamos multiplicar
80 mg × xml = 50 mg × 3ml
xml = 50 mg × 3 ml / 80 mg
xml = 1.875ml
Por tanto, se deben aplicar 1.875ml de gentamicina para administrar una dosis de 50 mg.
Answer:
The answer is 4 and -5.
Step-by-step explanation:
Working under the assumption that the first term is not 2x, but 2x², you can find the zero values by factoring the expression:
![y = 2x^2 + 2x - 40\\y = 2(x^2 + x - 20)\\y = 2(x + 5)(x - 4)](https://tex.z-dn.net/?f=y%20%3D%202x%5E2%20%2B%202x%20-%2040%5C%5Cy%20%3D%202%28x%5E2%20%2B%20x%20-%2020%29%5C%5Cy%20%3D%202%28x%20%2B%205%29%28x%20-%204%29)
With it factored we can see that x being equal to -5 or 4 will give a zero value
Let's also see it plotted, as the question said to use a graphing calculator:
Konichiwa~! My name is Zalgo and I am here to help you out on this amazing day. I believe the answer that you would be looking for is (x-1) (6x-1).
I hope that this answer helps! :3
"Stay Brainly and stay proud!" - Zalgo
(By the way, do you mind marking me as Brainliest? I'd greatly appreciate it! Arigato~! XP)