3 years ago

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Mathematics

1 answer:

Natasha2012 [34]3 years ago

8 0

There are a lot of dots but do I you have a question

I tried to count them but I kept losing track

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$14.40 for 4.5 pounds of beef

Svetradugi [14.3K]

Answer:

One pound of beef is $3.2

Step-by-step explanation:

14.40 / 4.5

= 3.2

CHECK:

3.2 * 4.5

=14.40

6 0

3 years ago

Read 2 more answers

Yuki888 [10]

Answer:

the box of cereal weighs 1.32 pounds

Step-by-step explanation:

1 kg = 1000 grams.

.6 kg = 600 grams

1kg=2.2

.6kg = 60% of 2.2

60% of 2.2 = 1.32 pounds

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3 years ago

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How is 12 60% of _? Please Help & Explain the process.

Temka [501]

12 is 60% of 20. You can make 60% into a fraction (60/100) and set that fraction equal to 12/x. You then cross multiply (12*100 and 60*x) to get 1200=60x. You then divide both sides by 60 to get x, which equals 20.

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4 years ago

Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidenc

quester [9]

Answer: 18

Step-by-step explanation:

The formula to find the minimum sample size is given by :_

$n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = population standard deviation.

z*= critical z-value.

E= Margin of error.

Given : $\sigma= 13$

E= ± 8

We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]

Then, the required sample size would be :

$n=(\dfrac{(2.576)\cdot (13)}{8})^2$

$\Rightarrow\ n=(4.186)^2$

$\Rightarrow\ n=17.522596\approx18$ [Round to next integer.]

Hence, the required minimum sample size = 18

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4 years ago

Simplify the expression: 3(q + 11) - 4

Nastasia [14]

Answer:

Step-by-step explanation:

6 0

3 years ago