Which expression can be used to find the volume of the sphere?

A sphere with diameter 10 inches.

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?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

What is the measure of angle 1? a.28 b.152 c.168 d.64