Pedro is planning to model how changes in weather affect evaporation fromlakes. For his second experiment, he wants to test how winds affect theevaporation rate. He places one beaker with 300 mL of water in an area awayfrom any fans, and he places another beaker with 300 mL of water near asmall fan. What is the independent variable in Pedro's experiment?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %