Asample of 49 observations is taken from a normal population with a standard deviation of 10. the sample mean is 55. determine the 99% confidence interval for the population mean. (round your answers to 2 decimal places.)

Given abcd ac=38 and ae=3x+4 find the value of x

Find the missing factor. write your answer inexponential form.9^2=9^4×

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.