HEL TIME Which of the following examples have a constant rate of change?

An electrician earns $50 the first hour plus $35 for every additional hour.

You are making meatballs and roll out 30 meatballs the in a half hour and then another 30 meatballs in the next 20 minutes.

The number of bacteria triples every hour.

The money you put in the bank earns 2% interest. This means that the bank pays you 2% of the amount of the money kept in the bank each year.

It ia an electrician earns $50 the first hour and $35 for every additional hour.

Step-by-step explanation:

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a

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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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step-by-step explanation: