The Water Department checks the city water suppy on a regular basis for contaminants such as lead. The water department takes 200 samoles and estimates that the concentration of lead in your drinking water is3.2 ppb, with a standard deviation of 0.3 ppb. Assuming the samples were random and unbiased, how much confidence can you have in this data?

You have learned about the six trigonometric functions, their definitions, how to use them, and how to represent them graphically. the sine, cosine, and tangent trigonometric functions can be paired with their reciprocal functions, cosecant, secant, and cotangent, respectively. think about how each function is related to its reciprocal function.how are the graphs of the reciprocal functions related to their corresponding original functions? what happens to the graphs of the reciprocal functions as x approaches the zeros of the original functions? describe how you would teach friends with different learning styles (visual-spatial, aural-auditory, verbal-linguistic, physical-bodily-kinesthetic, logical-mathematical, social-interpersonal, and solitary-intrapersonal) how to graph the reciprocal functions

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?