HELP ME ASAP PLEASE?!?If the pattern below follows the rule "Starting with 10, every consecutive line has a number one less than the previous line," how many marbles must be in
the sixth line?
A. 7
B. 5
C. 6
D. Need more information

Franco wants to double the volume of the cone. what should he do?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?