Which sentence demonstrates correct subject-verb agreement? a. dave wiens, a denver native and champion mountain biker, design the olympic mountain bike course in atlanta, georgia. b. exploring international mountain passes, such as those in new zealand, canada, and japan, are one of the biker’s favorite hobbies. c. wiens’s competitors, such as john tomac and mike kloser, inspires him to train more aggressively. d. knee injuries, neck and back pain, and weakness in the hands develops when poor bike training is used.

A. Dave Wiens, a Denver native and champion mountain biker, helped design the Olympic mountain bike in Atlanta, Georgia.

Explanation:

When a sentence is composed of a subject, two or more nouns or pronouns and when these are joined by the conjunction 'and', then  the verb form will comply in numbers to the performer(s) of the action - the subject.

Therefore, Dave Wiens helped design the Olympic mountain bike in Atlanta, Georgia, where a subject pronoun complies with helped design ( composite past tense of help  + (to has been suppressed)  design ( infinitive form).

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: