Given LM tangent to c at point l, find mjk+ mlk

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

What is the absolute value of the complex number -4-sqrt2i

Write the equation in logarithmic form 8^x=64