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Hunter-Best [27]
2 years ago
6

What's the GCF of 12a^2b^6, 28a^4 and 42ab^3? How did you find your answer?

Mathematics
1 answer:
8090 [49]2 years ago
6 0

12a^2b^6=(2a)(6ab^6)\\\\28a^4=(2a)(14a^3)\\\\42ab^3=(2a)(21b^3)\\\\GCF(12a^2b^6,\ 28a^4,\ 42ab^3)=2a

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What is 150% of 3000? Round to the nearest hundredth
marin [14]

We want to find 150% of 3000. since 150% is greater than 100%, it is expected that 150% 0f 3000 will also be greater than 3000.

150\text{\% of 3000 }=\frac{150}{100}\times3000=4500

Therefore, 150% of 3000 is equal to 4500.

4 0
1 year ago
At a large university, the mean amount spent by students for cell phone service is $58.90 per month with a standard deviation of
zhenek [66]

Answer:

2.28% probability that the mean amount of their monthly cell phone bills is more than $60

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

\mu = 58.90, \sigma = 3.64, n = 44, s = \frac{3.64}{\sqrt{44}} = 0.54875

What is the probability that the mean amount of their monthly cell phone bills is more than $60?

This is 1 subtracted by the pvalue of Z when X = 60. So

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

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{60 - 58.90}{0.54875}

Z = 2

Z = 2 has a pvalue of 0.9772

1 - 0.9772 = 0.0228

2.28% probability that the mean amount of their monthly cell phone bills is more than $60

4 0
3 years ago
How much feet are in 760yards
Triss [41]

2280 Ft there are 3 feet in a yard

8 0
3 years ago
Read 2 more answers
Solve this problem. Find the number of gallons of paint needed to cover all four sides four sides) of the building shown with tw
liraira [26]
The complete question in the figure attached

1) calculate the area <span>all four sides
A=[12+9+12+9]*8=336 ft</span>²

if 1 gallons---------------------------- > covers 350 ft²
X------------------------------------ > 336 ft²
X=336/350=0.96 gallons
but remember 
<span>that there are two coats of paint
</span>therefore
0.96*2----------- > 1.92------- > 2 gallons

the answer is 2 gallons

7 0
3 years ago
Read 2 more answers
Identify the triangles that are similar by the AA similarity theorem. explain how you know that the triangles are similar.
UNO [17]

Angle WVX = Angle YVZ (vertically opposite angles)

Angle VWX = Angle VYZ (shown)

Angle WXV = Angle YZV (total sum of angles in triangle)

4 0
2 years ago
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