((pls a girl ))

1.) suppose you send about 12 text messages a day, and your older sister sends more text messages than you do. together, you send a total of about 26 messages per day. about how many text messages does she send a day? write an equation and solve for the unknown value

2.) your father uses text messaging to communicate with his employees. if he sends an average of 19 text messages each day, how many more text messages does he send than you? write an equation and solve for the unknown value.

3.) your parents allow you to have internet access on your cell phone as long as you prepay the bill. if your bill is $17.50 per week, how much would you have to save per day to pay the bill? describe the step-by-step process you use to solve the problem.

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000