If r (t) = 4e3t, 2eâ3t, 4te3t, find t (0), r'' (0), and r' (t) · r'' (t).

Write an expression for the calculation the sum of the product of 4 and 3 and 1 and 1

What is x? 2x - x + 7 = x + 3 + 4

3/7 of what number = 21

The area of a regular hexagon is 55 in^2. Find the length of a side. Round your answer to the nearest tenth. I know the answer is 4.6 in., but I have no idea how to solve it.

What is the answer to this? 4/5 - 1/2=?

Abcd is a rectangle with b (-5, 0), c (7, 0) and d (7, 3). find the coordinatesof a.

Mary can make a costume twice as fast as Sam can. If they both work together, they can make it in 6 hours. How long will it take Mary to make the costume if she works alone?

An equiangular triangle is also known as: acute right. regular obtuse

Three friends each bought a different ipod nano music player the total for the three purcheses was $375 Thomas paid 30 more than Megan Ryan paid 15 less than Megan how much did each person pay

Trignometric ratios