This appears to be a list of calculus and limit problems, focusing on integrals, derivatives, and limits. Here's a breakdown of the first few problems:

1. Problem 1: Definite Integrals $\text{a. } \int_0^2 250u \, du$ Solution: Using the power rule for integration: $\int u \, du = \frac{u^2}{2}$ Apply this to the integral: $250 \int_0^2 u \, du = 250 \times \left[ \frac{u^2}{2} \right]_0^2 = 250 \times \left( \frac{2^2}{2} \right) = 250 \times 2 = 500$

   $\text{b. } \int_0^2 150 \, du$ Since this is a constant, the integral is simply: $150 \times (2 - 0) = 300$

   $\text{c. } \int_0^2 16u \, du$ Again, using the power rule: $16 \int u \, du = 16 \times \frac{u^2}{2} = 8u^2$ Evaluate at the limits: $8 \times (2^2 - 0^2) = 8 \times 4 = 32$

2. Problem 2: Derivatives $\text{a. Find the derivative of: } 7u(4u^2 - 12u)(2u + 2)$ This requires applying the product and chain rules for differentiation. You would first differentiate each part and simplify.

   $\text{b. Find the derivative of: } 7(u^2)(8u)$ Again, apply the product rule.

   $\text{c. Find the derivative of: } 7u(2u - 1)$ Simplifying and differentiating directly.

3. Problem 3: Limits $\text{a. } \lim_{u \to \infty} \left( \sqrt{9u^2 + 5u + 5} - \sqrt{9u^2 - 7u - 4} \right)$ To solve this, you would factor out $u^2$ from inside the square roots and simplify using limit properties.

Would you like detailed solutions for any specific problem from the list, or should I continue solving more problems?

Here are 5 related questions:

1. What are the general steps for solving definite integrals?
2. How do we apply the product rule in derivatives?
3. What techniques are used to evaluate limits at infinity?
4. How do we handle square roots in limit problems?
5. What is the power rule in integration?

Tip: Always simplify expressions as much as possible before applying calculus rules, especially in derivative and limit problems.