Which of the following is an example of biotechnology?

A. Bacteria are grown in a Petri dish in a lab

B. A student traces their family tree

C. DNA samples are compared and used to identify suspects in a crime

D. A calculator can perform complex problems

 C). DNA samples are compared and used to identify suspects in a crime.

Explanation:

See the picture below. FLVS

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

there are no correct statementd on the list of choices you provided.