The robotics club has created 10 racing robots for the end of year science fair. Each robot has the same chance of winning the race. What are the chances that Robot A and Robot B finish in the top three spots, but Robot in the top three?
A. 1/60
B. 1/120
C. 7/120
D. 3/10

Select the graph of the solution. click until the correct graph appears. |x| = 3

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.

1.multiply and simplify if possible. √7x (√x − 7√7) 2. what is the simplest form of the radical expression? 33√2a−63√2a