Why do we have different data types? why do we need them? what arethe barest essential data types for a programming language?

Which are not examples of chronic or persistent stress? moving

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

Barbara is interested in pursuing a career in the science and math pathway. which qualifications will her reach that goal? a.an advanced knowledge of physics and math b.an advanced knowledge of engineering and math c. an advanced knowledge of physics and robotics an d. advanced knowledge of machinery and math