Which is the more reasonable measurement of the diameter of a human hair:1.8 ⋅ 10−2 mm or 1.8 ⋅ 102 mm? Justify your answer

Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4

I’m really confused and need your assist me with this question i’ve never been taught

Judy garland electronics operate on a net-profile rate of 20% on its printer cables. if the markup is $8.95 and the overhead is $4.31,find the net profit and the selling price? use the net-profit rate formula to solve this problem.