This question has two parts. First, answer Part A. Then, answer Part B. Part A
BARBER A barber wants to purchase new professional shears from a Web site. The prices of all of the shears are shown in the table.
Cost of Shears ($)
50
165
55
79
84
68
38
42
a. Use the standard deviation formula to find the standard deviation of the data. Round your answers to the nearest cent.

step-by-step explanation:

well if you round, things become much more simple. round 5.95 to 6, 4.25 to 4, and 1.05 to 1. now, add 6+4+1 and that would equal 11. so the items together would equal to about $11.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

step-by-step explanation:

its 512 because parenthesis and to the 2nd power is 512 so it will be 512