Along piece of wood of length 2.8 m is broken into 4 pieces with two pieces of length a and the other two pieces of length b. the four pieces are put together to form a rectangle. find b if your aim is to have a rectangle with the maximum area.

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

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?