Barrons AP Calculus

(D)

18.

19.

(A)

(B)

(C)

(D)

20.

(A)

(B)

(C)

(D)

21.

(A)

(B)

(A)

(B)

(C)

(D)

concave downward

A   particle    moves   along   the curve   given   parametrically  by  x   =   tan t   and y

=   2   sin t.  At  the instant when     ,  the particle’s  speed   equals

Suppose     and y   =   2   when    x   =   0.  Use Euler’s method  with    two

steps   to  estimate    y   at  x   =   1.

1

2

3

5

Questions 20 and 21. The graph below consists of a quarter-circle and two line segments, and
represents the velocity of an object during a 6-second interval.

The object’s    average speed   (in units/sec)  during  the 6-second    interval    is

−1

1

The object’s    acceleration    (in units/sec^2 )   at  t   =   4.5 is

0

−1