This is business stats, but i keep getting stuck at this one part. if anyone can explain it to me, that'd be great!

if have to use a graphing calculator because this involves invnorm.

what i don't get is how to find the quartiles.

mean: 70
standard deviation: 10

question: between what two values are 68% of the scores?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88