1)The mass M in grams of sugar left in a teacup after t seconds is given by M=10.5-0.4t^2.
-use the secant method to approximate the instantaneous rate of change at t=2 seconds.

2)The height in metres of a ball dropped from the top of the CN tower is given by h(t)=-4.9t^2+450, where t is time elapsed in seconds
a)use the secant method to approximate the instantaneous velocity at t=1 seconds
b)Find the average velocity for the following time
interval
i)1

Question

1)The mass M in grams of sugar left in a teacup after t seconds is given by M=10.5-0.4t^2. 
-use the secant method to approximate the instantaneous rate of change at t=2 seconds.

2)The height in metres of a ball dropped from the top of the CN tower is given by h(t)=-4.9t^2+450, where t is time elapsed in seconds
a)use the secant method to approximate the instantaneous velocity at t=1 seconds
b)Find the average velocity for the following time  
interval
i)1<t<1.5

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