Lorene is a director of a preschool. she would like to communicate to parents about upcoming events. she should send a

She should send a Mail or a Message.

Explanation:

Since the article used in the sentence is "A" and not "An", it would not be correct to include the "Email" option because you would be making a grammatical error .

But, it is correct to say that you can send a mail or a message since in addition to being correct in the sentence they are also equally valid communication systems.

A large percentage of people use mobile phones, so it is correct to say that they have the option of receiving messages.

u = 30

continuing your method

= +

subtract from both sides

= - thus

= -

= ⇒ u = 30

answer/// randomly assign the participants to the   conditions