Betty begins her jog at her house, running towards Alice’s house. Alice begins her jog at her house, running towards Betty’s house. When they reach each other’s houses, they turn around and run in the opposite direction. If the distance between their first and second meetings is 100m, and the ratio of their speeds is 4:3, how far apart are their houses, in meters?

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!

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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step-by-step explanation:

answer4 to the second power is 16

and 4 to the third power is 64,