1960

1964

1968

1972

1976

1980

1984

0.56

0.26

1.01

1.67

1.04

1.71

1.38

1.38

1 the atmospheric co2 level a(t at a volcano at time t (in parts per million by volume is recorded. reading across, the annual values for the 4-year intervals are as follows.

1960

1964

1968

1972

1976

1980

1984

0.56

0.26

1.01

1.67

1.04

1.71

1.38

1.38

1988

1992

1996

2000

2004

2008

2012

2.15

0.46

1.25

1.64

1.56

1.60

2.66

2.66

(a estimate a'(t in 1962, 1970, 1978, 1986, 1994, 2002, and 2010. (use adjacent years to find your estimation.

a'(1962

=

a'(1970

=

a'(1978

=

a'(1986

=

a'(1994

=

a'(2002

=

a'(2010

=

b in which of the years from (a did the approximation to a'(t take on its smallest value?

c in which of these years does the approximation suggest that the co2 level was the most constant?

2 a particle moving along a line has position s(t = t4 acˆ’ 12t2 m at time t seconds. at which times is the particle instantaneously motionless (that is, it has zero velocity?

please show work