Identify the sentences with correct verb tense usage. check all that apply.

(a) the board of directors chose the cfo to represent the company on a trip to japan, and he accepts.
(b) the new e-mail policy begun yesterday.
(c) the hr department has known about the insurance premium increase for six weeks.
(d) she gave me the lincoln laser billing records before she left on vacation.

(C) The HR department has known about the insurance premium increase for six weeks.

(D) She gave me the Lincoln Laser billing records before she left on vacation.

Explanation:

The subject verb agreement in options C and D are correct.

Option C: The use of 'has known' is in the past form, thus the sentence is correct.

Option D: 'gave' is also a past tense, which agrees with the sentence as she had left for the holiday.

Whereas, Options A and B are wrong.

Option A: the board has chosen, meaning 'past tense' thus the use of 'accepts' which is a present tense is wrong.

Option B: the new policy had been started since yesterday, so the verb 'begun' which is the "third form of the verb' is wrong and should be used alongside a helping verb thus making it 'had begun'.

the answer is

r ≈5.641

plug in the area of 100 yards into the equation

100=

divide each side by pi

≈ 31.8309=

take the square root of each side to find r

=r

r ≈5.641

you didn't list the options but im guessing it's resolving contradictions