Let er be the unit radial vector and r=x2+y2+z2√. calculate the integral of f=e−rer over: (a) the upper-hemisphere of x2+y2+z2=25 , outward-pointing normal (b) the region on the sphere of radius r=5 centered at the origin that lies inside the first octant x, y,z≥0 (a) ∬sf⋅ds=

How do you use the elimination method for this question? explain, because i really want to understand!

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct