Physical Science Use the height formula in Example 10 to work the given problem. Note that...

Physical Science Use the height formula in Example 10 to work the given problem. Note that an object that is dropped (rather than thrown downward) has initial velocity v0 = 0.

Health The length L (in mm) of the mesiodistal crown of the first molar of a human fetus is approximated by

where t is the number of weeks since conception.

(a) At how many weeks is the length about 4 mm?

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(b) Explain why the second answer in part (a) does not apply here.