Abigail B. Gonzales assists the participants in graphing various functions. PANGLAO, Bohol—Teachers need to level up their teaching techniques, especially in mathematics. To train the teachers, the ...

A painting in an art gallery has height 3 m and is hung so that its lower edge is about 1 m above the eye of an observer. How far from the wall should the observer stand to get the best view? (i.e.

To approximate the definite integral we split the region up into many thin slices. For each slice we may approximate its area using rectangles, in which case we could either use right-endpoints, ...