Asolid exerts a force of 400 n. the pressure exerted by the solid on a surface if the area of contact is 2m2 will be (a) 10 pa (b) 100 pa (c) 0.1 pa (d) 1 pa
plz me out to find the answer with these options

What is the result of adding the system of equations? 2x+y=4 3x-y=6

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal

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?