Let r1, ..., rp be vectors in set of real numbers R Superscript n, and let Q be an m n matrix. Write the matrix [Upper Q Bold r 1 ...Q Bold r Subscript p ]as a product of two matrices (neither of which is an identity matrix).

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer