Answer will give 30 points and mark ! a biker sets out from point a to point b. during the first hour he gets 0.25 of the way there; during the second hour he covers 0.2 of the distance and, during the third hour, he covers 0.3 of the distance. after three hours, what part of the total distance has the biker traveled, and what part of his trip does he still have to go? explain how to do it.

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

it alot will look like this 4.4

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: