A security alarm requires a four-digit code. The code can use the digits 0–9 and the digits cannot be repeated. Which expression can be used to determine the probability of the alarm code beginning with a number greater than 7? A. (2 P 1) (9 P 3) /10 P 4 B. (2 C 1) (9 C 3)/10 C 4 C. (10 P 1) (9 P 3)/10 P 4 D.(10 C 1) (9 C 3)/10 C 4

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

Acomposition of transformations maps δxyz to δx"y"z". the first transformation for this composition is , and the second transformation is a 90° rotation about point x'.