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dexar [7]
3 years ago
12

can someone explain the prime factor method to me? i know it is used for large numbers, but say there is a large number. say tha

t number is, 1,260. how do i know the prime factors of this number to add to the factor tree?
Mathematics
1 answer:
Ludmilka [50]3 years ago
8 0
A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. so for example, 21 is A prime number. no two whole numbers times themselves would equal 21. To figure out if a number is prime, divide it by 2. If you don't get a whole number, it is prime
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If 2000 is placed into a bank account that pays 3% compound interest per year how much will be in the account after 2 years
Margarita [4]

Answer:

Account Balance = Principal x (1 + interest rate (decimal)) number of years, compounded annually.

Step-by-step explanation:

This is based on the information provided: 2121.80 (1.03)2 = 2000 So, on your initial deposit of 2000, you can collect 121.80 in interest after two years.

5 0
2 years ago
-5/8 ÷ 9/10<br><br> A. -25/36<br><br> B. -9/16<br><br> C. -45/80<br><br> D. -1/36
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A. -25/36

If There Is Any Other Fraction problems That You Need Help With, Go To This Site http://www.calculatorsoup.com/calculators/math/fractions.php

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2 years ago
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The question is in the picture. (Alegbra 1)
Nady [450]

OPTION D = 2q is right answer

6 0
3 years ago
The average breaking strength of a certain brand of steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sampl
Westkost [7]

Answer:

1963.2 pounds (lbs.)

Step-by-step explanation:

Things to understand before solving:

  • - <u>Normal Probability Distribution</u>
  1. The z-score formula can be used to solve normal distribution problems. In a set with mean ц and standard deviation б, the z-score of a measure X is given by: Z=\frac{X-u}{a}

The Z-score reflects how far the measure deviates from the mean. After determining the Z-score, we examine the z-score table to determine the p-value associated with this z-score. This p-value represents the likelihood that the measure's value is less than X, or the percentile of X. Subtracting 1 from the p-value yields the likelihood that the measure's value is larger than X.

  • - <u>Central Limit Theorem</u>
  1. The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean ц and standard deviation б , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean ц  and standard deviation s=\frac{a}{\sqrt{n} }

As long as n is more than 30, the Central Limit Theorem may be applied to a skewed variable. A specific kind of steel cable has an average breaking strength of 2000 pounds, with a standard variation of 100 pounds.

This means, ц  = 2000 and б = 100.

A random sample of 20 cables is chosen and tested.

This means that n = 20, s=\frac{100}{\sqrt{120} } =22.361

Determine the sample mean that will exclude the top 95 percent of all size 20 samples drawn from the population.

This is the 100-95th percentile, or X when Z has a p-value of 0.05, or X when Z = -1.645. So Z=\frac{X-u}{a}

  • By the Central Limit Theorem

Z=\frac{X-u}{a} \\-1.645=\frac{X-2000}{22.361} \\X-2000=-1.645*22.361

X =1963.2

<h3>Answer:</h3>

The sample mean that will cut off the top 95% of all size 20 samples obtained from the population is 1963.2 pounds.

3 0
2 years ago
Population density is a measure of how crowded an area is. The population density of Australia is approximately 7.6 people per s
meriva

Answer:

B

Step-by-step explanation:

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