book Maths Puzzle Numerical Ability

Hi,
I could use some help with this.
Lisa is flying her kite with 62 feet of string attached to the ground. She measures 5feet of string from the ground to a point 4 feet high. How high is her kite?

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book Other Question

please help me solve this inequality

j - 8 < 4
-
4


( j over 4 -8 < 4)
Can you help with this question?

Say that the variance of a set of data is 24/5. At a minimum, about how many data points will be within 4.3818 of the mean of measurements?

A. 4/5
B. 3/4
C. 2/3
D.1/2