Which of the following is not one of the three geometric means between 5 and 80? a.30
b.10.
c.40
d.20​

The reason for this geometric progression is 2

The three interpolated terms are:

10 , 20 and 40.

STEP BY STEP EXPLANATION :

5 , ___ , ___ , ___ , 80

An = A1 • [Q^(n - 1)]

80 = 5 • [Q^(5 - 1)]

80 = 5 • [Q^4]

5 • [Q^4] = 80

[Q^4] = 80/5

[Q^4] = 16

Q = \mathsf{\sqrt[4]{16}}

4

16

Q = 2

Ok

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.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation:

idk idk idk idk idk

step-by-step explanation: