1. The five-number summary for all student scores on an exam is 40, 60, 70, 75, 79.

Suppose 100 students took the test.

How many STUDENTS had scores between 40 and 70?

2. Suppose we know that the mean heart disease death rate is 200 per 100K people and is normally distributed across 27 countries. Suppose we also know that the greatest death rate reported is 220 per 100K and the lowest death rate reported is 180 per 100K. What should be a statistically-savvy person's best guess as to the SD of this distribution?

38.6°

step-by-step explanation:

resultant is 10 pound

smaller force = 8 pound

angle formed = tan⁻¹(

                        =tan⁻¹(

                          =tan⁻¹(0.8)

                        =38.6°

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64