An isosceles trapezoid has a perimeter of 25.9 inches. Its shorter base measures 1.7 inches and its longer base measures 2.8 inches. The two remaining sides have the same length; what is that length?

10.7 in.

Step-by-step explanation:

perimeter = base1 + base2 + side1 + side2

side1 = side2 = side

side1 + side2 = 2 * side

25.9 in. = 1.7 in. + 2.8 in. + 2 * side

2 * side = 21.4 in.

side = 10.7 in.

42

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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