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2 years ago

72 is what percent of 45

Mathematics

1 answer:

Aloiza [94]2 years ago

8 0

Answer:

160%

Step-by-step explanation:

45= 100%

72= ?%

100×72/45 = 160

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uppose a large telephone manufacturer has a problem with excessive customer complaints and consequent returns of the phones for

vodka [1.7K]

Answer:

The answer is "294.2075".

Step-by-step explanation:

Given:

$\hat{p} = 0.5 \\\\1 - \hat{p} = 1 - 0.5 = 0.5\\\\E = 4\% = 0.04\\\\$

At $83\%$ confidence level the z is ,

$\alpha = 1 - 83\% = 1 - 0.83 = 0.17\\\\\frac{\alpha}{2} = \frac{0.17}{2} = 0.085\\\\Z_{\frac{\alpha}{2}} = Z_{0.085} = 1.3722\\\\n = (\frac{Z_{\frac{\alpha}{2}}}{E})^2 \times \hat{p} \times (1 - \hat{p})\\\\$

$= (\frac{1.3722}{0.04})^2 \times 0.5 \times 0.5\\\\= (34.305)^2 \times 0.5 \times 0.5\\\\= 1,176.83 \times 0.5 \times 0.5\\\\= 1,176.83 \times 0.25\\\\=294.2075$

5 0

3 years ago

Lydia drives from city a to city b to transport goods. her return speed is 3 times her departure speed and she takes 40 minutes

gizmo_the_mogwai [7]

Answer:

1 hour

Step-by-step explanation:

Hello, let's say that her departure trip takes t in minutes, as her return speed is 3 times her departure speed, she took t/3 for the return and we know that this 40 minutes less, so we can write.

t/3=t-40

We can multiply by 3

t = 3t -40*3 = 3t - 120

This is equivalent to

3t -120 = t

We subtract t

2t-120 = 0

2t = 120

We divide by 2

t = 120/2 = 60

So this is 60 minutes = 1 hour.

Thank you.

4 0

3 years ago

Which expression gives the same value as 3 + 5(x + 2) − 4 when you substitute x = 3 and x = 4?

slamgirl [31]

Your answer is C.
Hope this helps.

8 0

3 years ago

Read 2 more answers

A submarine is 730 m below sea level. An airplane that is directly over the submarine is 9,144 m above sea level. What is the ve

Rina8888 [55]

Submarine: -730
Airplane: 9,144
|-730-9,144|=|-9,874|=9,874
|d|: absolute value
The vertical distance between the submarine and airplane is 9,874 meters.

4 0

3 years ago

Read 2 more answers

Traveling at an average rateaverage rate of between 40 and 50 miles per hour for 3 to 4 hours select the best estimate for the d

JulijaS [17]

Answer:

160 miles

Step-by-step explanation:

Distance = speed × time

Speed 1 = 40miles/hr , speed 2 = 50 miles/hr

Time 1 = 3 hrs, time 2 = 4 hrs

Distance 1 = speed 1 × time 1

= 40× 3 = 120 miles

Distance 2 = speed 2 × time 2

= 50 × 4 = 200 miles

Average distance = (distance 1+distance 2 ) ÷ 2

Distance = (200+120) ÷ 2 = 320 ÷2

= 160 miles

I hope this was helpful, please mark as brainliest

6 0

3 years ago

72 is what percent of 45​

72 is what percent of 45