What is the value of P+Q+R+S?

Hamsa is hiking at a rate of 4 miles per hour. At this rate, how long will it take him to hike 18 miles?

GaryK [48]

Answer:

dia4 horas y me

Step-by-step explanation:

6 0

3 years ago

The quality manager at Bestiful Company is certifying a new process that must produce 95% (or better) good product before the pr

Nadya [2.5K]

Answer:

The calculated value Z= -0.5822

|z| = |-0.5822|< 2.576 at 0.01 level of significance

Hence null hypothesis is accepted

The quality manager at Restful Company is certifying a new process that must produce 95% (or better) good product

Step-by-step explanation:

Explanation:-

Step:-(i)

The Population proportion is P = 95% =0.95

A sample of 40 containers from the process line are tested, and 93% are found to be good

Sample size ( n) =40

The sample proportion 'p' = 0.93

Level of significance (α )= 0.01.

Null hypothesis:-p = 95%=0.95

Alternative hypothesis:- p≠0.95

The test statistic

$Z = \frac{p-P}{\sqrt{\frac{PQ}{n} } }$ (i)

Step:(ii)

substitute all values in (i)

$Z = \frac{0.93-0.95}{\sqrt{\frac{0.95X0.05}{40} } }$

Z = -0.5822

The calculated value Z= -0.5822

|z| = |-0.5822|< 2.576 at 0.01 level of significance

Hence null hypothesis is accepted

Conclusion:-

The quality manager at Restful Company is certifying a new process that must produce 95% (or better) good product

4 0

3 years ago

the crowd at a sporting event is estimated to be 3000 people. the exact attendance is 2486 people. what is the percent error? pl

Vinil7 [7]

Answer:

%error is the difference between the expected and actual
3000-2486=514
514/3000= 17.33% error

6 0

3 years ago

A baseball is thrown in a parabolic arc. Help?

Katyanochek1 [597]

Answer:

The maximum height of the baseball is 9 feet

Step-by-step explanation:

we have

$p(t)=\frac{1}{2}gt^2+v_0t+p_0$

where

p(t) ----> baseball position above the ground in feet

t ----> the time in seconds

v_0 ----> is the initial velocity in ft/sec

p_0 ---> initial position above the ground

we have

$g=-32\frac{ft}{sec^2} \\\\v_0=16\frac{ft}{sec}\\\\p_0=5\ ft$

substitute the given values

$p(t)=\frac{1}{2}(-32)t^2+16t+5$

$p(t)=-16t^2+16t+5$

This is the equation of a vertical parabola open downward

The vertex represent a maximum

Convert the quadratic equation in vertex form

$p(t)=-16t^2+16t+5$

Factor -16 leading coefficient

$p(t)=-16(t^2-t)+5$

Complete the square

$p(t)=-16(t^2-t+\frac{1}{4})+5+4$

$p(t)=-16(t^2-t+\frac{1}{4})+9$

Rewrite as perfect squares

$p(t)=-16(t-\frac{1}{2})^2+9$

The vertex is the point (0.5,9)

The maximum height of the baseball above the ground is the y-coordinate of the vertex

therefore

The maximum height of the baseball is 9 feet

8 0

3 years ago

Need help homework due tomorrow! is it correct and need help on 9

Lera25 [3.4K]

Answer:

B. -1

Step-by-step explanation:

I just looked over it quickly, everything looks correct.

To see if a number is in the solution set, plug it in and see if its true:

0 - 9 > -10

-9 > -10

true

-1 - 9 > -10

-10 > -10

false

1 - 9 > -10

-8 > -10

true

2 - 9 > -10

-7 > -10

true

The only solution that doesn't work is B. -1

3 0

3 years ago