Molecules of a toxic chemical eventually decompose into inert substances. suppose the decomposition time is exponentially distributed with a mean of 1/lambda. the half-life of such a persistent poison is that time beyond which the probability is .50 that a particular molecule will remain toxic. find the half-life for chemicals whose molecules have an average decomposition time of (a) 6 yearshalflife= ? years(b) 40 yearshalflife= years(c) 344 yearshalflife= ? years(d) 5584 yearshalflife= ? years

The average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction work force after he graduates in 2012. his friend tells him that average hourly earnings for construction workers will rise by 2% from 2009 to 2012. based on the data below, assuming that the projected hourly earnings are correct, is jason’s friend’s statement accurate? construction industry - average hourly earnings, 2000-2009 a. his friend’s statement is accurate. the average hourly earnings will increase by 2%. b. his friend’s statement is not accurate. the percent increase will be more than 2% c. his friend’s statement is not accurate. the percent increase will be less than 2% d. his friend’s statement is not accurate. the average hourly earnings will decrease

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.