A basis for the subspace of R4 spanned by the vectors Vi = [0 1 0 – 1], v2 = [5 1 1 0],
is consisting of k vectors. What is k?
V3 = [0 – 2 0 2]
a) 4
b)3
c)2
d) 1

What is sin 7x/4 ? i need on this urgent trig

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score