Find the unit tangent vector T(t) at the point with the given value of the parameter t. r(t) =

t2 − 3t, 1 + 4t,
1
3
t3 +
1
2
t2

, t = 3

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Solve 3x-18=2y and 5x-6y=6 by elimination show work

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?