An index that is a standardized measure used in observing infants over time is approximately normal with a mean of 96 and a standard deviation of 10. a) Using the empirical rule, approximately what percent of infants have an index score between 86 and 126?
b) Using the appropriate table, what proportion of infants have an index score of between 90 and 100?
c) What index score is greater than 33% of the population index scores?
d) What index score is the 89th percentile?

answer: finding the extract measurements and knowing the points

step-by-step explanation:

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61

answer: b

step-by-step explanation: