The average number of hours of sleep per night was 9.46 hours for a sample of 104 five to seven year-old children. the number 9.46 is a because it is a number that can be computed from the sample of 104 children.

step-by-step explanation:

abc

step-by-step explanation:

the shape,the size and the distance

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,