Answer:
40.6428571429
Explanation:
To evaluate the expression for the given value of the variable when t = -1/2, we just need to substitute the value of t into the expression:
41 + 5/7 * (-1/2) = 41 - 5/14
41 - 5/14 = 40.6428571429
So the answer is 40.6428571429.