You roll 4 dice. Find the probability of each of these outcomes.
(a) Exactly two 1's
(b) Exactly three 1's
(c) At least three 1's
(a) P(X = 2) =

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air