in a game you flip a coin twice, and record the number of years that occur. you get 10 points for 2 heads, zero points for 1 head, and 5 points for no heads. what is the expected value for the number if points you'll win per turn.

a. 5
b. 5
c. 7.5
d. 3.75

3. find the radius of circle p.4. find y.

Consider the reaction 2x2y2+z2⇌2x2y2z which has a rate law of rate= k[x2y2][z2] select a possible mechanism for the reaction.

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles