The pool at the park is 18 feet wide how many yardsticks would it take to measure the width of the pool

12-(-19)= <br><br>HELP ME OUT PLZ

Vikentia [17]

Answer:

31

Step-by-step explanation:

A negative negative is a positive

12- (-19)

12+19

31

6 0

3 years ago

A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic ca

Ugo [173]

Answer: A. 664

Step-by-step explanation:

Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.

But there is no information regarding the population proportion is mentioned.

Formula to find the samples size , if the prior estimate to the population proportion is unknown :

$n=0.25(\dfrac{z*}{E})^2$

, where E = Margin of error.

z* = Two -tailed critical z-value

We know that critical value for 99% confidence interval = $z*=2.576$ [By z-table]

Margin of error = 0.05

Then, the minimum sample size would become :

$n=0.25(\dfrac{2.576}{0.05})^2$

Simplify,

$n=0.25\times2654.3104=663.5776\approx664$

Thus, the required sample size= 664

Hence, the correct answer is A. 664.

5 0

3 years ago

How the hell you do them diamond problems

Black_prince [1.1K]

you are stupid hahaha

6 0

3 years ago

Read 2 more answers

On Saturday, Louise ran 19/4 miles, Beth ran 45/10, Staci ran 4 3/5 miles. Which list shows these distances in order from greate

nalin [4]

Louise ran than Staci than Beth
<span>19/4 miles > 4 3/5 miles > 45/10 miles</span>

6 0

2 years ago

What is the rate of change for this function / careful / how can it be interpreted using the problem context?

UNO [17]

Step-by-step explanation:

FORMATION OF TABLE FOR THE FUNCTION $c\:=\:4t\:-\:150$

As t represents the temperature in degrees Fahrenheit and c represents the number of cricket chirps per minute.

Considering the function

$c\:=\:4t\:-\:150$

when $t = 40$

then $c = 4(40) - 150 = 160 - 150 = 10$

when $t = 50$

then $c = 4(50) - 150 = 200 - 150 = 50$

when $t = 60$

then $c = 4(60) - 150 = 240 - 150 = 90$

when $t = 70$

then $c = 4(70) - 150 = 280 - 150 = 130$

when $t = 80$

then $c = 4(80) - 150 = 320 - 150 = 170$

when $t = 90$

then $c = 4(90) - 150 = 360 - 150 = 210$

when $t = 100$

then $c = 4(100) - 150 = 400 - 150 = 250$

So

Lets form the data table for this function based on the determined values

$t\:\:\:\:\:\:\:40\:\:\:\:\:\:\:\:\:\:50\:\:\:\:\:\:\:\:\:\:60\:\:\:\:\:\:\:\:\:\:70\:\:\:\:\:\:\:\:\:\:\:80\:\:\:\:\:\:\:\:\:\:90\:\:\:\:\:\:\:\:\:\:\:100$

$c\:\:\:\:\:\:\:\:10\:\:\:\:\:\:\:\:50\:\:\:\:\:\:\:\:\:\:\:90\:\:\:\:\:\:\:\:\:130\:\:\:\:\:\:\:\:\:170\:\:\:\:\:\:\:\:\:210\:\:\:\:\:\:\:\:\:\:250$

PART 1)

Considering the function

$c\:=\:4t\:-\:150$

As we know that

when $t = 60$

then $c = 4(60) - 150 = 240 - 150 = 90$

Meaning the number of chirps per minute would increase to $90$ , when the temperature t in degrees Fahrenheit increase to 60.

The appropriate logic is that the speed at which cricket chirps is based on the temperature. The table table also indicates that as the temperature t increases, the number of cricket chirps also increases.

PART 2)

A rate of change is a rate that determines how one quantity changes in relation to another quantity.

Considering the two points

$(40, 10)$

$(50, 50)$

$\mathrm{Slope\:between\:two\:points}:\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}$

$\left(x_1,\:y_1\right)=\left(40,\:10\right),\:\left(x_2,\:y_2\right)=\left(50,\:50\right)$

$m=\frac{50-10}{50-40}$

$m=4$

It logically means for every increase of $10$ units in $t$ (temperature in degrees Fahrenheit), the value of $c$ (number of chirps) is increasing to $40$ units.

Thus, the rate of change will be $4$ .

Part 3)

Considering the function

$c\:=\:4t\:-\:150$

The data table for this function

$t\:\:\:\:\:\:\:40\:\:\:\:\:\:\:\:\:\:50\:\:\:\:\:\:\:\:\:\:60\:\:\:\:\:\:\:\:\:\:70\:\:\:\:\:\:\:\:\:\:\:80\:\:\:\:\:\:\:\:\:\:90\:\:\:\:\:\:\:\:\:\:\:100$

$c\:\:\:\:\:\:\:\:10\:\:\:\:\:\:\:\:50\:\:\:\:\:\:\:\:\:\:\:90\:\:\:\:\:\:\:\:\:130\:\:\:\:\:\:\:\:\:170\:\:\:\:\:\:\:\:\:210\:\:\:\:\:\:\:\:\:\:250$

Putting $t = 40$ in the function brings the value of $c$ as $10$ .

i.e.

$c\:=\:4\left(40\right)\:-\:150=160=10$

Yes, it does make sense.

Its logical meaning is that at the start, when the value of $t$ was $40$ temperature in degrees Fahrenheit, then the value of $c$ (number of chirps per minute) was $10$ .

4 0

3 years ago