If a spool for thread is 2 cm in diameter, then one wind ofthread is about how many centimeters long? (Use 3.14 for .) Explainhow to mentally check whether your answer is reasonable.

L8 - 5 1− 4 ex. lim x x2 x→4 4 − x 1 − 4 x x2 x ▯=4 Now let f(x) 4 − x . 2 x =4 What is lim f(x) x→4