Which statement describes the order of rotational symmetry for an isosceles triangle?
A. An isosceles triangle has an order 0 rotational symmetry because there is no angle at which it can be rotated onto itself
B. An isosceles triangle has an order 1 rotational symmetry because it does not have all congruent angles
C. An isosceles triangle has an order 2 rotational symmetry because it has 1 pair of congruent angles.
D. An isosceles triangle has an order 3 rotational symmetry because it has 3 angles.

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 point slope form of a line with slope -5 that contains point (2,-1)

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?