Which object has a mass of approximately 450 grams? a. football b. tree c. needle d. horse

Can someone me and plz do the problem

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.