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3 years ago

Name at least two independent variables that could result in a change in a monthly electric bill.

Mathematics

1 answer:

Olin [163]3 years ago

4 0

Answer:

The non-production machinery that uses electricity, the physical size of the items, the skill level of the operators, and the outdoor temperature and humidity could all be independent variables in the monthly electricity cost. Step-by-step explanation.

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How is 7 21/25 written as a decimal

aivan3 [116]

Im pretty sure the answer is 7.84. i got this because 7 is a whole number so it is in the whole number spot. Then, you have to get your denominator to 100. So, what times 25 equals 100? its 4. so you get 100 so whatever you do to your denominator you do to your numerator. so 21 times 4 is 84. so 84/100 is actually 7.84. Hope this helped

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4 years ago

A recipe called for the ratio of tumeric to cumin to be 5 : 4. If you used 40 ounce of tumeric, how many ounces of cumin would y

VashaNatasha [74]

Answer:

32 ounces of cumin

Step-by-step explanation:

You have a ratio of

Tumeric : Cumin

5 : 4

40 ounces : ?

You divide 40 by 5 and get 8.

So you do 8 x 4 and get 32 ounces

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3 years ago

The cost of a phone is reduced by 20%. The new cost is $70.40. What was the original price?

Anton [14]

Answer:

.8x = $70.40

x = 70.4/.8

x = $88

Step-by-step explanation:

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3 years ago

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What is the area of the triangle? 216 cm 270 cm 360 cm 540 cm

Ivahew [28]

I think the answer 270 cm

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4 years ago

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If the weight (in grams) of cereal in a box of Lucky Charms is N(489,6), what is the probability that the box will contain less

Wittaler [7]

Answer:

0.000064 = 0.0064% probability that the box will contain less than the advertised weight of 466 g.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

N(489,6)

This means that $\mu = 489, \sigma = 6$

What is the probability that the box will contain less than the advertised weight of 466 g?

This is the p-value of Z when X = 466. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{466 - 489}{6}$

$Z = -3.83$

$Z = -3.83$ has a p-value of 0.000064

0.000064 = 0.0064% probability that the box will contain less than the advertised weight of 466 g.

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3 years ago