The data below represents the number of t-shirts sold per week by a student who started his own online t-shirt business. find the weighted mean of the number of t-shirts sold per week. (round your answer to the nearest tenth if necessary.)
t-shirts sold per week frequency
2 1
4 4
6 7
8 3

The sum of the frequency column is the total number of weeks reported.

1+4+7+3 = 15 weeks

The sum of the product of the number of t shirts and the number of weeks that many tee shirts were sold is the total number of t shirts sold

2*1 + 4*4 + 6*7 + 8*3 = 2 + 16 + 42 + 24 = 84

The average number of T shirts sold per week is the weighted mean, which is the quotient of the total number of t shirts and the total number of weeks:

84/15 = 5.6

5.6

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)