 # College math questions and answers

Recent questions in Post Secondary Alyce Wilkinson 2020-12-24 Answered

### (-4, k), (6, -7) , m = $-\frac{1}{5}$ bobbie71G 2020-12-24 Answered

### Show that quaternion multiplication is not commutative. That is, give an example to show that sometimes $\epsilon \eta$ does not equal $\eta \epsilon$. CMIIh 2020-12-24 Answered

### Find the critical points of the following functions.Use the Second Derivative Test to determine (if possible) whether each critical point corresponds to a local maximum, a local minimum,or a saddle point. If the Second Derivative Test is inconclusive,determine the behavior of the function at the critical points. $f\left(x,y\right)=y{e}^{x}-{e}^{y}$ SchachtN 2020-12-24 Answered

### Find solution $\underset{x\to 0}{lim}\frac{\mathrm{tan}x-\mathrm{sin}x}{{x}^{3}}$ ankarskogC 2020-12-24 Answered

### Explain how its avissidep 2020-12-22 Answered

### A population of values has a normal distribution with $\mu =77$ and $\sigma =32.2$. You intend to draw a random sample of size $n=15$ Find the probability that a sample of size $n=15$ is randomly selected with a mean between 59.5 and 98.6. $P\left(59.5<\stackrel{―}{X}<98.6\right)=$? Write your answers as numbers accurate to 4 decimal places. kuCAu 2020-12-22 Answered

### Solve given Inferences involving two populations A study in Pediatric Emergency Care compared the injury severity between younger and older children. One measure reported was the Injury Severity Score(ISS). The standard deviation of ISS scores for 37 children 8 years or younger was 23.9,v and the standard deviation for 36 children older than 8 years was 6.8. Assume that ISS scores are normally distributed for both age groups. At the 0.01 level of significance, is there sufficient Feason to conclude that the standard deviation of Iss Scores for younger children is larger than the standard deviation of Iss scores for older children? he298c 2020-12-22 Answered

### Find the laplace transform of the following 1) SHIFTING $f\left(t\right)=\left(1+t{e}^{-t}{\right)}^{3}$ snowlovelydayM 2020-12-22 Answered

### Exploring the role of sample size: a. Construct 1,000 confidence intervals with $n=10,p=0.3$. What proportion of the $95\mathrm{%}$ confidence intervals included the population proportion, 0.3? b. Construct 1,000 confidence intervals with $n=40,p=0.3$. What proportion of the $95\mathrm{%}$ confidence intervals included the population proportion, 0.3? c. Construct 1,000 confidence intervals with $n=100,p=0.3$. What proportion $95\mathrm{%}$ confidence intervals include the proportion of the population, 0.3? Ernstfalld 2020-12-22 Answered

### The rectangular coordinates of a point are given (2, -2). Find polar coordinates of the point. Express theta in radians. tinfoQ 2020-12-21 Answered

### Solve the IVP with Laplace Transform:$\left\{\begin{array}{l}y"+4{y}^{\prime }+4y=\left(3+t\right){e}^{-2t}\\ y\left(0\right)=2\\ {y}^{\prime }\left(0\right)=5\end{array}$ CMIIh 2020-12-21 Answered

### A survey of 4826 randomly selected young adults (aged 19 to 25) asked, "What do you think are the chances you will have much more than a middle-class income at age 30?" The two-way table summarizes the responses. Choose a survey respondent at random. Define events G: a good chance, M: male, and N: almost no chance. Find $P\left(C\mid M\right)$. Interpret this value in context. defazajx 2020-12-21 Answered

### To solve: the system of equation $2x+3y=5\phantom{\rule{1em}{0ex}}\text{and}\phantom{\rule{1em}{0ex}}6x+9y=15$. Lewis Harvey 2020-12-21 Answered

### Check $\left(21,00\right),\left(00,20\right),\left(3-1,00\right),\left(03,01\right)$ is a bais for M22 or not? vazelinahS 2020-12-21 Answered

### Use long division to rewrite the equation for g in the form $\text{quotient}+\frac{remainder}{divisor}$ Then use this form of the function's equation and transformations of $f\left(x\right)=\frac{1}{x}$ to graph g. $g\left(x\right)=\frac{2x+7}{x+3}$ banganX 2020-12-21 Answered

### Find derivatives of the functions defined as follows. $s=2\cdot {3}^{\sqrt{t}}$ defazajx 2020-12-21 Answered

### Let R be a commutative ring. Show that R[x] has a subring isomorphic to R. Albarellak 2020-12-17 Answered

### There were 855 major league baseball players in 2012 and their mean salary was $m=3.44$ million dollars with standard deviation $s=4.70$ million dollars.If we take random samples of size $n=30$ players and calculate the mean salary, in millions of dollars, of each sample, describe the shape, center, and standard error of the distribution of sample means. CMIIh 2020-12-17 Answered

### Solve differential equation $y={e}^{\left(}6x\right)-3x-2$ ddaeeric 2020-12-17 Answered

### To calculate:The score Lily must earn on her fifth test to have an overage of 80 if on Lily's four College Algebra tests, her scores were 71,79,83 and 89.

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