Ip address 10.10.20.0 255.255.255.224 how many host ip addresses are available in each subnet using this subnet mask?

Can online classes such as gradpoint track your ip location like if im taking a final and i give somebody else my account and they take the final for me will it show where they are taking the final from? and can this be countered with a vpn

Shown below is the start of a coding region within the fist exon of a gene. 5'--3' 3'--5' how many cas9 pam sequences are present?

Why would a programmer use the logical operator and in an if statement? a: when an action is to be taken that requires both conditions to be falseb: when an action is to be taken that requires both conditions to be truec: when an action is to be taken that requires the first condition to be falsed: when an action is to be taken that requires the second condition to be truei took the test and the answer is b.