Express 3a^2b^-1 with positive exponents.

9x^3y^6/xy^6 Solve using only positive exponents

DedPeter [7]

Look at the attached picture

Hope it will help you...

Good luck on your assignment

6 0

3 years ago

From the top of a tower 120m high the angle of depression of a stone on the ground is found to be 30°. How far is the stone from

gogolik [260]

Step-by-step explanation:

so from this, I think the difference is 207.84 m

:)

8 0

2 years ago

How do you find the area of a square

Lubov Fominskaja [6]

Answer:

width times length

Step-by-step explanation:

7 0

3 years ago

The mean height of women in a country (ages 20-29) is 64 4 inches A random sample of 50 women in this age group is selected What

Simora [160]

Answer:

0.0721 = 7.21% probability that the mean height for the sample is greater than 65 inches.

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 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.

Central Limit Theorem

The Central Limit Theorem establishes 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 $s = \frac{\sigma}{\sqrt{n}}$ .