a tom tom hoop drum is made up of streched membranes, called heads, which are held tightly across a tubular shell. the drum has diameter 30 cm and height 30 cm. the shell of the drum is made of 5 layers of birch sheathing. a) how much sheating is needed to make the shell?

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

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much