9. the sides of a rectangle are increased by a scale factor of 4. the perimeter of the smaller rectangle is 20 cm. what is the perimeter of the larger rectangle? (1 point) 320 cm 80 cm 120 cm 60 cm 10. a right triangle has an area of 13 m2. the dimensions of the triangle are increased by a scale factor of 3. what is the area of the new triangle? (1 point) 39 m2 169 m2 117 m2 142 m2 12. the width of a picture is 20 cm. using a color copier, you reduce the width of the picture to 5 cm. what is the scale factor of the dilation? (1 point) 5 1 over 5 4 1 over 4 13. on a given blueprint, 1 inch = 16 feet. if the dimensions of the bedroom on the blueprint are 0.75 inches × 1.5 inches, what are its actual measurements? (1 point) 16 ft × 32 ft 12 ft × 24 ft 16 ft × 24 ft 12 ft × 32 ft 14. using the same scale factor, what are the blueprint dimensions for a room that is 20 feet x 28 feet? (1 point) 1.5 in. × 2.5 in. 1.25 in. × 2.25 in. 1.25 in. × 1.75 in. 1.5 in. × 1.75 in. 15. the scale of a map is 1 in.: 75 mi. how many actual miles does 0.85 inches represent? (1 point) 88.2 miles 63.75 miles 95.6 miles 4,781.3 miles

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation:

step-by-step explanation:

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step-by-step explanation: