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Shtirlitz [24]
3 years ago
15

Abby can buy an 8 pound bag of dog food for $7.40 or a 4 pound bag of the same dog food for $5.38 which is the better buy

Mathematics
2 answers:
Umnica [9.8K]3 years ago
8 0
The 8 pound bag of dog food for $7.40 is the better buy.
Sav [38]3 years ago
8 0
The 8 pound bag is better

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On a standardized exam, the scores are normally distributed with a mean of 165 and astandard deviation of 40. Find the z-score o
vladimir1956 [14]

The Z-score is calculated by the formula below

\begin{gathered} z-score=\frac{(x-\mu)}{\sigma}_{} \\ \mu=\operatorname{mean} \\ \sigma=s\tan dard\text{ deviation} \\ x=\text{score} \end{gathered}

Step 2: Substitute the given parameters in the formula

\begin{gathered} z-\text{score}=\frac{145-165}{40} \\ Z=-\frac{20}{40} \\ Z=-\frac{1}{2} \\ Z=-0.5 \end{gathered}

Hence, the z-score of a person who scored 145 on the exam is -0.5

8 0
1 year ago
Which of the following is equal to the rational expression when x doesn’t equal 5 or -1? (X-7)(x+1)/(x+1)(x-5)
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Step-by-step explanation:

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Step-by-step explanation:

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A family buys 6 airline tickets online. The family buys travel insurance that costs $18 per ticket. The
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A chocolate company makes chocolate malt balls that have a radius of 0.34
IceJOKER [234]

Answer:

<h2>Approximately 141 malt balls</h2>

Step-by-step explanation:

this problem is on the mensuration of solids shapes.

first we need to calculate the volume of the rectangular prism

volume of prsim= l*b*h

given that

length= 1.5 in

breath=2.5 in

hieght= 6 in

volume= 1.5*2.5*6

volume=22.5 in^3

secondly we then calculate the volume of a malt ball

given that

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volume of sphere = 4/3*3.124*(0.34)^3

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= volume of prism/volume of sphere

= 22.5/0.16

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3 0
3 years ago
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