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Ray Of Light [21]

2 years ago

8

Tina spent 1/4 of her money on a new purse.She paid her mom $5 that she had borrowed and she spent $5.75 on hair ribbons. If she

had $20.00 left, how much money did she start with?

1 answer:

Grace [21]2 years ago

6 0

Answer: 41$

Step-by-step explanation:

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saul85 [17]

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Construct a 99% confidence interval for the population standard deviation of white blood cell count (in cells per microliter). A

kogti [31]

Answer:

The correct option is 1.148 < σ < 6.015

Explanation:

The 99% confidence interval for the standard deviation is given below:

$\sqrt{\frac{(n-1)s^{2}}{\chi^{2}_{\frac{0.01}{2} }} }$

Where:

$\chi^{2}_{\frac{0.01}{2} }=18.548$

$\chi^{2}_{1-\frac{0.01}{2}}=0.676$

Therefore, the 99% confidence interval is:

$\sqrt{\frac{(7-1)2.019^{2}}{18.548} }$

$1.148$

Therefore, the option 1.148 < σ < 6.015 is correct

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3 years ago

Q # # 12 find the volume of the cylinder to the nearest cubic foot Use a calculator

Ronch [10]

The diagram in the question is a cylinder.
;The volume of a cylinder is given by;

Volume = πr²h
;Where π=3.14
r⇒radius of the base of the cylinder and
h ⇒ height of the cylinder.

∴Volume = 3.14×5²×3
=235.5 ft³

To the nearest cubic = 236 ft³

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3 years ago

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