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Yakvenalex [24]
2 years ago
12

Mattie Evans drove 160 miles in the same amount of time that it took a turbo propeller plane to travel 920 miles. The speed of t

he plane was 190 mph faster than the speed of the car. Find the speed of the plane.
Mathematics
1 answer:
Hoochie [10]2 years ago
8 0

Answer:

Step-by-step explanation:

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A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage provider.
Zigmanuir [339]

Answer: (20.0\%,24.0\%)

Step-by-step explanation:

Given, A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage provider.

Here , 1,627 adults are determining the sample.

Thus, sample size : n = 1627

Also, the sample proportion of adults felt fully engaged with their mortgage provider are \hat{p}=22\%=0.22

for 95% confidence level , critical z-value =1.96

Then , the 95% confidence interval would be :-

\hat{p}\pm z\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

Substituting values , we get

0.22\pm 1.96(\sqrt{\dfrac{0.22(1-0.22)}{1627}})\\\\=0.22\pm 1.96\sqrt{\dfrac{0.22\times0.78}{1627}}\\\\\approx0.22\pm0.0201\\\\=(0.22-0.0201,\ 0.22+0.0201)\\\\=(0.1999,\ 0.2401)\approx(20.0\%,24.0\%)

Hence, the required 95% confidence interval using only 1 decimal : (20.0\%,24.0\%) .

4 0
3 years ago
HELPPPPPPPPP PLEASE DUE IN 20 MINUTES
adelina 88 [10]
Y= 3/6 x - 3
or
y= 1/2 x -3
3 0
3 years ago
Line AB contains points A (1, 2) and B (−2, 0). The slope of line AB is...
anygoal [31]
The answer is positive since the slope is positive.
3 0
3 years ago
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At cycle and sport, customers can rent bikes, electric scooters, kayaks, canoes or paddleboards by the hour. Ari is renting a bi
Ivan

Answer:

Option A,  9b + 10s is correct

Step-by-step explanation:

The complete question is

At cycle and sport customers can rent bikes, electric scooters, kayaks, canoes, or paddleboards by the hour. Ari is renting a bi ke, and meg is renting an electric scooter. Which expression represents the total cost for Ari to rent a bike for b hours and Meg to rent a scooter for s hours (Please answer ASAP) A. 9b + 10s B. 9 + 10 C. (9+b) + (10 + s) D. 9 + 10 x b + s  

Solution

The price of renting a bike for one hour is $9

The price of renting a scooter for one hour is $10

Given -

Ari rents a bike for b hours and Meg rents a scooter for s hours

Total cost of renting a bike is 9 * b

Total cost of renting a scooter is 10* s

The total cost of renting both the bike and scooter is

9b + 10s

Hence, option A is correct

7 0
3 years ago
Please help I don't really understand if you could just give me the answer that would be amazing thanks
Sedaia [141]
X=1
At least I'm 99% sure
Sorry. I'm not good at math
4 0
4 years ago
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