What is the standard deviation of the following data set rounded to the nearest tenth?

534,524,539,530,537,522

A. 6.3

B. 6.4

C. 40

D. 41

A bag contains 3 blue and 2 green marbles. What is the probability of drawing a blue marble folowed by a green marble, without replacing the first marble?

Steve's doctor has advised him to take protein supplements. He bought two brands, Brand A and Brand B. The table gives the amount of calcium, iron, and vitamins (in milligrams per spoonful) in each of the two brands.

During her pre-college years, Elise won 30% of the swim races she entered. During college, Elise won 20% of the swim races she entered. We can conclude that, in high school and college combined, Elise won

Anita runs 5/8 mile everyday. How many miles does she run in 5 days?

The sequence is recursive. Find the value of the next term in the sequence. 5,8,11,14,17, ...

Mikey worked 8 hours on Wednesday, 6 hours on Thursday, and 7 hours on Friday. His gross pay for all three days was $187.95 A. $8.95 B. $8.98 C. $28.13 D. 65.63

Ray cupple bought a basic car costing 26,500, with options costing 725.00. There is a 6% sales rax in his state and a combined 50.00 license and registration fee. What was ray's total cost

theater technician charges a $200 flat fee and 5% of all profits from ticket sales per show. If the technician made $400.00 on a show, how much total profit was there from ticket sales?

Line L1 has the equation 3x-30y=6 Express the equation of L1 in the slope-intercept form

In Mrs. Smith's enrichment class, 25% of the students are boys. There are 7 boys in the class. How many total students are in Mrs. Smith's enrichment class?