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Readme [11.4K]
2 years ago
12

Jenny has saved $3,800 over the last 12 months. She saved either $250 or $350 a month. During the 12 month period, how many time

s did Jenny save $250 for the month? A) 3 B) 4 C) 5
Mathematics
2 answers:
Greeley [361]2 years ago
8 0
Hello,

Here is your answer:

The proper answer to the question is option A "3".

Here is how:

There is only two options 250 and 350 and there is 12 months which means there can only be three for both.

Your answer is A.

If you need anymore help feel free to ask me!

Hope this helps!
Wewaii [24]2 years ago
8 0

Answer:

the answer is actually 4

Step-by-step explanation:

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Step-by-step explanation:

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Formula for the area of the triangle:

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Notice that the answers have no exponents (²). That is because they are used only on the area of shapes as units.

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3 years ago
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 141 millimeters,
tiny-mole [99]

Answer:

Probability that the sample mean would be greater than 141.4 millimetres is 0.3594.

Step-by-step explanation:

We are given that Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 141 millimetres, and a standard deviation of 7.

A random sample of 39 steel bolts is selected.

Let \bar X = <u><em>sample mean diameter</em></u>

The z score probability distribution for sample mean is given by;

                            Z  =  \frac{ \bar X-\mu}{\frac{\sigma}{\sqrt{n} }  } }  ~ N(0,1)

where, \mu = population mean diameter = 141 millimetres

           \sigma = standard deviation = 7 millimetres

           n = sample of steel bolts = 39

Now, Percentage the sample mean would be greater than 141.4 millimetres is given by = P(\bar X > 141.4 millimetres)

      P(\bar X > 141.4) = P( \frac{ \bar X-\mu}{\frac{\sigma}{\sqrt{n} }  } } > \frac{141.4-141}{\frac{7}{\sqrt{39} }  } } ) = P(Z > 0.36) = 1 - P(Z \leq 0.36)

                                                            = 1 - 0.6406 = <u>0.3594</u>

The above probability is calculated by looking at the value of x = 0.36 in the z table which has an area of 0.6406.

8 0
3 years ago
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