This is reflections and coordinates on a graph. 8th grade math. need answers for all

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

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?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.