Arecent study examined the association between high blood pressure and increased risk of death from cardiovascular disease. there were 2676 men with low blood pressure and 3338 men with high blood pressure. in the low-blood-pressure group, 21 men died from cardiovascular disease; in the high-blood-pressure group, 55 died.
a. compute the 95% confidence interval for the difference in proportions.
b. do the study data confirm that death rates are higher among men with high blood pressure? state hypotheses, carry out a significance test, and give your conclusions.

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

After a dreary day of rain, the sun peeks through the clouds and a rainbow forms. you notice the rainbow is the shape of a parabola. the equation for this parabola is y = -x2 + 36. graph of a parabola opening down at the vertex 0 comma 36 crossing the x–axis at negative 6 comma 0 and 6 comma 0. in the distance, an airplane is taking off. as it ascends during take-off, it makes a slanted line that cuts through the rainbow at two points. create a table of at least four values for the function that includes two points of intersection between the airplane and the rainbow. analyze the two functions. answer the following reflection questions in complete sentences. what is the domain and range of the rainbow? explain what the domain and range represent. do all of the values make sense in this situation? why or why not? what are the x- and y-intercepts of the rainbow? explain what each intercept represents. is the linear function you created with your table positive or negative? explain. what are the solutions or solution to the system of equations created? explain what it or they represent. create your own piecewise function with at least two functions. explain, using complete sentences, the steps for graphing the function. graph the function by hand or using a graphing software of your choice (remember to submit the graph).