Find the magnitude of the sum
of these two vectors and the degree

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Which of the following list the divisions of the geologic time scale in order from longest to shortest