The cost of a long distance phone call using company A's calling plan is $3.90 plus $0.35 per minute. How many minutes was a long distance phone call made using company A's calling plan if the total cost was $38.90?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.