It took Kim 2 hours 34 minutes to type an 11 page research paper for Biology. What was
Kim's average typing speed?

How

4.7 seconds per word

Step-by-step explanation:

11/2.34=4.7

(Im only guessing)

2nd one in the first row is correct

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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