Consider the given vector equation. r(t) = 5 sin(t)i + 2 cos(t)j (a) find r'(t). r'(t) = incorrect: your answer is incorrect. (b) sketch the plane curve together with position vector r(t) and the tangent vector r'(t) for the given value of t

Can someone me out here and the tell me the greatest common factor

[tex]5 \times1 \frac{12}{13} [/tex] me

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?