Find the mean of the data. 4.7,8.51,6.5,7.42,9.64,7.2,9.3

Given data is {4.7,8.51,6.5,7.42,9.64,7.2,9.3}

Now question says to find the mean of the given data.

Mean is also called average. Which can be found by adding given terms then divide the sum by total number of terms in the given data set.

Hence final answer is mean = 7.61

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