First blank: Rational
Second blank: 2/9
Third blank: 22/100 = 11/50
Fourth blank: irrantional
Fifth blank: no fraction equivalent
Sixth blank: perfect square
Seventh blank: non-perfect square

4 0

2 years ago

The distribution of the number of hours people spend at work per day is unimodal and symmetric with a mean of 8 hours and a stan

Wewaii [24]

Answer: 95% of all people work between 7 hours and 9 hours per day and It is true.

Step-by-step explanation:

Since we have given that

Mean = 8 hours

Standard deviation = 0.5 hours

According to Empirical Rule,

at 95% confidence, it lies within 2 standard deviations from the mean

so, lower value is given by

$mean-2\times sd\\\\=8-2\times 0.5\\\\\=8-1\\\\=7\ hours$

upper value is given by

$mean+2\times s.d\\\\=8+2\times 0.5\\\\=8+1\\\\=9\ hours$

Hence, 95% of all people work between 7 hours and 9 hours per day.

Therefore , it is true.

4 0

3 years ago

Solve the system of linear equations by graphing.

Katyanochek1 [597]

The answer is a) x=-4.5, y=-4.25

6 0

3 years ago