Asap

1. calculate the variance of the data:
if you use excel to complete this calculation, identify the formula used and your solution. show work here, not just an answer!

2.calculate the standard deviation of the data:
if you use excel to complete this calculation, identify the formula used and your solution. show all work here!

What is the solution to the equation 9^(x+1) =27

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt