Which of the following choices is the variance of the sample shown here? 30, 32, 47, 57, 66,79
A. 19.2
B. 205.5
C. 17.6
D. 371.8
E. 309.2

Which of the following is the formula for the sequence graphed below

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)