Find the Speed of a Particle with the Given Position $$\mathrm { r } ( t ) = t \mathbf { i } + 5 t ^ { 2 } \mathbf { j } + 3 t ^ { 6 } \mathbf { k }$$

question 84

Multiple Choice

Find the speed of a particle with the given position function.
$$\mathrm { r } ( t ) = t \mathbf { i } + 5 t ^ { 2 } \mathbf { j } + 3 t ^ { 6 } \mathbf { k }$$

• A) \(| v ( t ) | = \sqrt { 1 + 100 t ^ { 2 } + 100 t ^ { 10 } }\)
• B) \(| \mathrm { v } ( t ) | = \sqrt { 1 + 100 t + 324 t ^ { 9 } }\)
• C) \(| \mathrm { v } ( t ) | = 1 + 100 t ^ { 2 } + 324 t ^ { 10 }\)
• D) \(| v ( t ) | = \sqrt { 1 + 100 t ^ { 2 } + 324 t ^ { 10 } }\)
• E) \(| \mathrm { v } ( t ) | = \sqrt { 1 + 100 t + t ^ { 9 } }\)

---

Definitions:

Phenylketonuria

A genetic disorder resulting from the body’s failure to oxidize an amino acid, perhaps because of a defective enzyme.

Phenylalanine

An amino acid of a protein.

Mental Retardation

A now outdated term referring to a developmental disability that affects intellectual and adaptive functioning.

Allergens

Substances that can trigger an allergic reaction in sensitive individuals.