Use the chain rule to find dz/dt. z = 6 + x2 + y2 , x = 3 ln t, y = cos t

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

20 ! brainliest ! add and simplify your answer.