Me 45points! mr. jones typed for 10 minutes at a constant rate of 40 words per minute. mrs. gonzales typed the same number of word s at a constant rate of 50 words per minute. how many minutes did it take mrs. gonzales to type the same amount as mr. jones? set up; 10(40)=x times 50 identify; mrs. gonzales' time is unknown ckeck; 10(40)=8(50) solve; x=8 strategize; let x = mrs. gonzales' time

Mr Jones typed 40 * 10 = 400 words.

Mrs Gonzales took 400 / 50 = 8 minutes to type same number of words.

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step-by-step explanation

2r= 2300

r =1150

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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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