Acondominium building has 25 condo units. each unit has 5 windows. ryder said that there are 125 windows altogether.

which estimate can be used to see if ryder’s answer is reasonable? is ryder correct?

a.
30 × 5
the answer is not reasonable. ryder is not correct.

b.
30 × 5
the answer is reasonable. ryder is correct.

c.
30 ÷ 5.
the answer is not reasonable. ryder is not correct.

d.
30 + 5.
the answer is reasonable. ryder is correct.

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

What is the value of p in the equation y^ = -4x?