Answer:
19/15
Step-by-step explanation:
1 2/3=5/3
So 5/3 - 2/5 ( + - is -)
Making the denominator equal we get
(25-6)/15=19/15
Answer:
The answer is "36.14%"
Step-by-step explanation:
The complete question is given in the attached file please find it.
Using z-table to find the value.

This means that between 42 and 48 months, 36.14 % of scanners could be predicted will break down.
Use the quadratic formula to find the values of x:
![x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%5B%5D%7Bb%5E2-4ac%7D%7D%7B2a%7D)
Where a, b and c are the coefficients of the quadratic equation.
![\begin{gathered} x=\frac{-43\pm\sqrt[]{43^2-4\cdot8\cdot30}}{2\cdot8} \\ x=\frac{-43\pm\sqrt[]{1849-960}}{16} \\ x=\frac{-43\pm\sqrt[]{889}}{16} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20x%3D%5Cfrac%7B-43%5Cpm%5Csqrt%5B%5D%7B43%5E2-4%5Ccdot8%5Ccdot30%7D%7D%7B2%5Ccdot8%7D%20%5C%5C%20x%3D%5Cfrac%7B-43%5Cpm%5Csqrt%5B%5D%7B1849-960%7D%7D%7B16%7D%20%5C%5C%20x%3D%5Cfrac%7B-43%5Cpm%5Csqrt%5B%5D%7B889%7D%7D%7B16%7D%20%5Cend%7Bgathered%7D)
The equation has two solutions for x.
![\begin{gathered} x1=\frac{-43+\sqrt[]{889}}{16} \\ x2=\frac{-43-\sqrt[]{889}}{16} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20x1%3D%5Cfrac%7B-43%2B%5Csqrt%5B%5D%7B889%7D%7D%7B16%7D%20%5C%5C%20x2%3D%5Cfrac%7B-43-%5Csqrt%5B%5D%7B889%7D%7D%7B16%7D%20%5Cend%7Bgathered%7D)
As decimal numbers:
Answer: We can be 95% confident that the true proportion of all college students gain weight in their freshman year.
Step-by-step explanation:
- A 95% confidence interval interprets that a person can be 95% confident that the true population parameter lies in it.
Given : A popular claim, nicknamed "freshman fifteen," states that many college students gain weight in their freshman year.
The 95% confidence interval as 55.9% < p < 78.4%.
Here : Population parameter = p , where p is the proportion of college students gain weight in their freshman year.
Interpretation of 95% confidence interval : We can be 95% confident that the true proportion of all college students gain weight in their freshman year.
Answer:
Mia has a bag that contains a letter block for each of the 26 letters of the alphabet. She draws a letter block from the bag, writes down the letter, and puts the block back in the bag. She repeats this 26 times. The results show that she drew a vowel (A, E, I, O, or U) 6 times.
Step-by-step explanation: