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forsale [732]
3 years ago
8

The $299.99 cell phone Brittany purchased was on sale for 10% off. What amount did Brittany save?

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
4 0

Answer:

you save $30

Step-by-step explanation:

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Step-by-step explanation:

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Write the percent as a fraction or mixed number in simplest form. 72.5
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Salinas planting a circular flower bed radius of 3 1/2 feet she plans Chase around it with wire fencing that cost 0.89 $ a foot
Brut [27]

Answer:

Total Fencing Cost =$19.57

Step-by-step explanation:

If Rosalina is planning on fencing, we are talking about the Perimeter of the Flower Bed

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6 0
4 years ago
Identify the correct HYPOTHESIS used in a hypothesis test of the following claim and sample data: Claim: "The average annual hou
lora16 [44]

Answer:

We accept H₀

Step-by-step explanation:

Population mean  μ₀ = 47500

Population standard deviation unknown

Sample size    n = 86   degree of freedom  df = 86 - 1  df = 85

Sample mean    μ = 48061

Sample standard deviation 2,351

The claim implies a two tail test with t-studend distributon

Null  Hypothesis                 H₀               μ  =  μ₀

Alternative Hypothesis      Hₐ               μ  ≠  μ₀      

Confidence Interval  mean α = 0,02     and   α/2  =  0,01

With α/2 and df = 85, from t-table we find  t(c)  critical value

t(c) = 2,3710

We compute t(s) as

t(s)  =  ( μ - μ₀ ) / s /√n

t(s)  = ( 48061 - 47500 )/ 2351/√86

t(s)  = 561 * 9,273 / 2351

t(s) = 2,212

Now we compare t(s) and t(c)

t(s) < t(c)       2,212  < 2,371

Then we are in the acceptance region. We accept H₀

5 0
3 years ago
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