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2 years ago

Find the value of (1/5)^-3

Mathematics

2 answers:

Citrus2011 [14]2 years ago

8 0

Answer:

125

Step-by-step explanation:

using the rule of exponents

$(\frac{a}{b}) ^{-n}$ = $(\frac{b}{a}) ^{n}$

then

$(\frac{1}{5}) ^{-3}$

= $(\frac{5}{1}) ^{3}$

= 5³

= 125

joja [24]2 years ago

3 0

125
Explanation: that is the answer

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2 ways to simplify 4(5+6)

Mariana [72]

#1: 4*5 + 4*6=20+24=44
#2: 4*(5+6)=4*11=44

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2 years ago

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A group pre-orders 12 tickets for a sightseeing tour, even though they don't have the money to pay for them yet. Each ticket cos

Sav [38]

404 is the answer. if you add them all together

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3 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

3 years ago

Estimate the difference. 9 1/2- 1 6/7

Sav [38]

Answer:

$= 7 \frac{9}{14} \\$

Step-by-step explanation:

$9 \frac{1}{2} - 1 \frac{6}{7} \\ \frac{19}{2} - \frac{13}{7} \\ \frac{133 - 26}{14} \\ = \frac{107}{14} \\ = 7 \frac{9}{14}$

hope this helps

brainliest appreciated

good luck! have a nice day!

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3 years ago

Find the real numbers x and y that make the equation true. -4 + yi = x + 3i

erastova [34]

Equate the real and imaginary parts independently to find x and y.
Real part: -4=x, so x=-4
Imag. part yi=3i, so y=3

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3 years ago