Add or subtract -1+(-3)

A manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding ma

stepladder [879]

Answer: 196

Step-by-step explanation:

As per given , we have

Population standard deviation: $\sigma=0.6\ lb$

Significance level : $\alpha: 1-0.98=0.02$

Using the z-value table , the critical z value for 98% confidence : $z_{\alpha/2}=2.33$

Margin of error : E= 01 lb

Sample size : $n=(\dfrac{z_{\alpha/2}\cdot\sigma}{E})^2$

$n=(\dfrac{(2.33)\cdot(0.6)}{0.1})^2$

Simplify , we get

$n=195.4404\approx196$

Hence, the minimum sample size required for books = 196

8 0

3 years ago

The Greendale fifth graders sat in the balcony at Symphony Hall. 15 students sat in each row. How many rows did they fill?

bazaltina [42]

How many 5th graders total. Take that number divide it by 5 to get your answer.

6 0

3 years ago

Renaldo catches the bus at 4:00 onto ride 3.2 miles from his house to the dentist office. He arrives at 4:30 p.m for one hour ap

asambeis [7]

The bus is traveling at 6.4 miles per hour. The appointment was 1 hour long so he gets out at 5:30. From 5:30 to 6:30 is one hour, and at that speed, the bus could go 6.4 miles within that timeframe. So yes, he has time because 6.4 is greater than 4.8.

6 0

4 years ago

Which graph represents the following piecewise defined function?

kenny6666 [7]

The correct answer is shown in attached figure
To find the correct graph, we should study the continuity of the function

Check the continuity at x = -2
from the left ⇒⇒ f(-2) = 1/2 * -2 + 3 = 2
from the right ⇒⇒ f(-2) = 2
∴ The function is continuous at x = -2

Check the continuity at x = 3
from the left ⇒⇒ f(3) = 2
from the right ⇒⇒ f(3) = 2*3 - 3 = 3
∴ The function is jump discontinuous at x = 3

From the previous results the correct graph is the last as shown in attached graph.