The chart below contains the results of a survey in which students were asked about their cell phone plan Cell Phones Plans
Plan
No cellphone
Voice only
Voice and texting
Voice, texting, and data
Students
20
14
12
What percent of the students surveyed have a phone plan with texting?
1696
2496
3296
6896

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:

because that’s us why

you need to rotate this triangle about the origin 270 degrees clockwise to create the full square.

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !