The number in scientific notation is:
= 9.3 × 10^-10
Answer:
The variance is 30698.6
Step-by-step explanation:
The billing rates for six dental procedures are listed below:
$663
$273
$410
$622
$174
$374
The mean is given by:
![\bar X=\frac{663+273+410+622+174+374}{6}=\frac{2516}{6}=419.333](https://tex.z-dn.net/?f=%5Cbar%20X%3D%5Cfrac%7B663%2B273%2B410%2B622%2B174%2B374%7D%7B6%7D%3D%5Cfrac%7B2516%7D%7B6%7D%3D419.333)
The variance is given by:
![\sigma^2=\frac{\sum(x-\bar x)^2}{n}](https://tex.z-dn.net/?f=%5Csigma%5E2%3D%5Cfrac%7B%5Csum%28x-%5Cbar%20x%29%5E2%7D%7Bn%7D)
![\sigma^2=\frac{(663-419.333)^2+(273-419.333)^2+(410-419.333)^2+(622-419.333)^2+(174-419.333)^2+(374-419.333)^2}{6}](https://tex.z-dn.net/?f=%5Csigma%5E2%3D%5Cfrac%7B%28663-419.333%29%5E2%2B%28273-419.333%29%5E2%2B%28410-419.333%29%5E2%2B%28622-419.333%29%5E2%2B%28174-419.333%29%5E2%2B%28374-419.333%29%5E2%7D%7B6%7D)
![\sigma^2=30698.56](https://tex.z-dn.net/?f=%5Csigma%5E2%3D30698.56)
Therefore the variance is 30698.6
Answer:
Step-by-step explanation:
two birthday gifts n each costs $12.50 so 12.50x2 = $25
sales tax was 6.75% on $25 = 25x6.75/100 = $1.69
total cost including tax = 25+1.69 = $26.69
Answer: The equation is 2j + 3 = 36
Step-by-step explanation: The first clue is Mindy’s age which is given as 36. Also Jake’s age is given as j. However the clue to finding Jake’s age is that,
Mindy’s age is three years older than (that is + 3) two times Jake’s age (that is 2 x j, or simply 2j).
If Mindy’s age is 36, then the equation needed to solve for Jake’s age is
36 = 2j + 3 OR better still
2j + 3 = 36