If ab = 21 centimeters, and bc = 28 centimeters, which does ac equal?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

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

Tom drove 206 miles in 3.9 hours. estimate his average speed.