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3 years ago

11

Use the rules of exponents to evaluate and simplify the following expression. Type all without negative exponents. Do not distri

bute the exponent in the answer.
(x y) ^-3 =

is it 1/(xy)?

1 answer:

Rainbow [258]3 years ago

5 0

We are given (xy)^(-3).

This leads to 1/(xy)^3.

You see, going from the top to the bottom alters the sign of the exponent to its opposite.

ANSWER: 1/(x^3•y^3)

Did you follow?

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1.07, 1.7 and 1.007 in order from<br><br>greatest to least

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Solve the Inequality Give 5 solutions of the inequality ( Show your solution).<br> 2x -3 < 5

marysya [2.9K]

Answer:

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x<4

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Interval Notation:

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Step-by-step explanation:

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3 years ago

The number of square feet per house is normally distributed with a population standard deviation of 154 square feet and an unkno

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Step-by-step explanation:

Confidence interval for population mean:

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

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As per given , we have

n= 16

$\sigma = 154$ square feet

$\overline{x}= 1550$ square feet

$\alpha= 1-0.80 = 0.20$

Critical z-value = $z_{\alpha/2}=z_{0.2/2}=z_{0.1}=1.2815$

Confidence interval for population mean:

$1550\pm (1.2815)\dfrac{154}{\sqrt{16}}\\\\ = 1550\pm (1.2815)\dfrac{154}{4}\\\\= 1550\pm 49.33775\\\\ =(1550-49.33775,\ 1550+49.33775)\\\\\approx (1500.66,\ 1599.34)$

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