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2 years ago

Kim only has $24 to buy pens and notebooks. Each pen costs $2. Each

Mathematics

2 answers:

GarryVolchara [31]2 years ago

8 0

Answer:

Step-by-step explanation:

The answer is 5 notebooks and 3 pen

aksik [14]2 years ago

7 0

Answer:

There are probably more than this but here

$12 for pens would give you 6

$12 for notepads would give you 4

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$18 for notepads would give you 6

$6 for pens would give you 3

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$21 for for notepads would give you 7

$2 or pens would give you 1

and $1 left

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$6 for notepads would give you 2

$18 for pens would give you 9

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Lana71 [14]

Answer:

405

Step-by-step explanation:

To find sample size, use the following equation, where n = sample size, za/2 = the critical value, p = probability of success, q = probability of failure, and E = margin of error.

$n=\frac{(z_{\frac{\alpha }{2} })^{2} *p*q }{E^2}$

The values that are given are p = 0.84 and E = 0.03.

You can solve for the critical value which is equal to the z-score of (1 - confidence level)/2. Use the calculator function of invNorm to find the z-score. The value will given with a negative sign, but you can ignore that.

(1 - 0.9) = 0.1/2 = 0.05

invNorm(0.05, 0, 1) = 1.645

You can also solve for q which is 1 - p. For this problem q = 1 - 0.84 = 0.16

Plug the values into the equation and solve for n.

$n =\frac{(1.645)^2*0.84*0.16}{(0.03)^2}\\n= 404.0997333$

Round up to the next number, giving you 405.

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Step-by-step explanation:

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