A rectangular cube with sides measuring 4 cm, is made with blocks. Two straight tunnels of 4 cubes each are taken out. All exposed surfaces are painted including inside the tunnels. How many small cubes have been painted on exactly 3 faces?

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?