The following table shows the speeds at which Jeff does 444 activities. For example, biking has a rate of 191919 miles in 222 hours. Activity Miles Hours
Biking 191919 222
Walking 141414 444
Running 151515 333
Swimming 181818 444
Which type of activity does Jeff do at a speed of 4.54.54, point, 5 miles per hour?

his chances of getting a coin of higher value is 4/19

step-by-step explanation:

a is the right answer

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

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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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