3 years ago

Can anyone help with this question

Mathematics

1 answer:

WARRIOR [948]3 years ago

7 0

Answer:

Step-by-step explanation:

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7^3 times 7^-7 times 7

dusya [7]

Hello there! :)

Answer: $\frac{1}{343}$

*The answer must have a fraction.*

Step-by-step explanation:

Lesson: Zero and Negative Exponents.

Distributive property: a(b+c)=ab+ac

First, you apply exponent rule.

$a^b*a^c=a^b^+^c$

$7^-^3$

$\frac{1}{7^3}=7^3=7*7*7=343$

Final answer: $\frac{1}{343}$

Hope this helps!

Thanks!

-Charlie

Have a great day!

4 0

2 years ago

Find the perimeter of a rectangle that has a length of 3ft, and a width of (c+4)ft.

vazorg [7]

P=2(l+w) hope this helps :)

6 0

2 years ago

C/38 = 44/19 what does c equal?

frez [133]

Answer:

c = 88

Step-by-step explanation:

c/88 = 44/19

19×c = 44×38

19c = 1672

c = 88

5 0

2 years ago

Matt tried to evaluate 49 x 24 using partial products. His work is shown below

KIM [24]

Answer:

step 5

Step-by-step explanation:

5 0

2 years ago

In a survey of 468 registered voters, 152 of them wished to see Mayor Waffleskate lose her next election. The Waffleskate campai

wariber [46]

Answer: b. Yes

Step-by-step explanation: Confidence Interval for a population proportion is calculated as:

p ± $z\sqrt{\frac{p(1-p)}{n} }$

where

p is the sample proportion

n is sample size

z is z-score, in this case, as it is 95%, z-score=1.96

Calculating confidence interval:

$p=\frac{152}{468}$

p = 0.3248

0.3248 ± $1.96\sqrt{\frac{0.3248(0.6752)}{468} }$

0.3248 ± $1.96\sqrt{0.000468}$

0.3248 ± 0.0425

Interval: 0.2823 < μ < 0.3673

The interval means we are 95% sure the true mean is between 0.2823 and 0.3673. As the campaign claims a proportion of no more than 0.32 of the voters wants to see Mayor Waffleskate defeated and the number is in the confidence interval, the claim is supported.

4 0

2 years ago