Typical machined parts require very tight tolerance in variance in order to work properly in their application. We took a sample of the length (in mm.) of 100 units from a large production run and got the following statistics: sample mean = 499.97, sample variance = 6.52 What is the 99% confidence interval estimate for the true population VARIANCE in unit length?
a. (499.30, 500.64)
b. (4.97, 8.93)
c. (4.64, 9.71)
d. (4.79, 9.32)
e. none of the above

Igure 1 and figure 2 are two congruent parallelograms drawn on a coordinate grid as shown below: 4 quadrant coordinate grid showing two parallelograms. figure 1 has vertices at negative 5, 2 and negative 3, 4 and negative 4, 7 and negative 6, 5. figure 2 has vertices at 5, negative 2 and 7, negative 4 and 6, negative 7 and 4, negative 5. which two transformations can map figure 1 onto figure 2? reflection across the y-axis, followed by reflection across x-axis reflection across the x-axis, followed by reflection across y-axis reflection across the x-axis, followed by translation 10 units right reflection across the y-axis, followed by translation 5 units down

Tim earns $120 plus $30 for each lawn he mows.write an iniqualityvto represent how many lawns he needs to mow to make more than $310

How do i simply this radical expression?