Assume that x is a char variable has been declared and already given a value. write an expression whose value is true if and only if x is an hexadecimal (base 16) digit (0-9 plus a-f or a-f).

Give me the equations of two lines that have the same slope but are not parallel.

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?