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3 years ago

Which choice is equivalent to the expression below √-81

Mathematics

1 answer:

garri49 [273]3 years ago

4 0

Answer:

Step-by-step explanation:

$\sqrt{-81}$ is the same as $\sqrt{81}$ · $\sqrt{-1}$

This can be simplified to 9 · $\sqrt{-1}$

And the square root of -1 is i,

so this equals 9i

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Find the perimeter and the area of the figure. Round answers to the nearest tenth.

vlada-n [284]

Answer:

34 rounded is 30

Step-by-step explanation:

15 plus 15 is 30 30 plus 4 is 34

7 0

2 years ago

In a large population, 71 % of the people have been vaccinated. If 4 people are randomly selected, what is the probability that

Oksi-84 [34.3K]

Answer:

The answer is "0.9929"

Step-by-step explanation:

$\text{The distribution in binomials is n = 4 and p = 0.71.}\\\\\text{Vaccinated Pr(AT LEAST ONE) = 1-pr( no people vaccinated ).}$

$= 1 - Bin (n=4, k =0, p=0.71) \\\\= 1 - C(4,0) \times 0.71^0 \times (1-0.71)^{4-0} \\\\= 1 - (1 \times 0.29^4)$

$= 1 - (1 \times 0.00707281)\\\\=0.9929$

5 0

3 years ago

Asap Select the correct answer. Which function has a restricted domain?

german

Step-by-step explanation:

Check second one

$\\ \rm\Rrightarrow k(x)=(-x+3)^{\frac{1}{2}}$

1/2 means square root

$\\ \rm\Rrightarrow \sqrt{(-x+3)}$

$\\ \rm\Rrightarrow -x+3>0$

$\\ \rm\Rrightarrow -x>-3$

$\\ \rm\Rrightarrow x$

Hence.

Domain is restricted

Option B is correct

8 0

2 years ago

Absolute value of -6.2 is _________. 1. 6.2 2. 6 3. 7 4. -6

s2008m [1.1K]

<h2>SOLVING</h2>

$\Large\maltese\underline{\textsf{A. What is Asked}}$

What is the absolute value of -6.2? It's _____________.

$\Large\maltese\underline{\textsf{B. This problem has been solved!}}$

No matter what the number is, its absolute value is always positive.

The number -6.2 is not an exception, there's nothing special about that number. Its absolute value is also positive.

$\cline{1-2}$

$\bf{Result:}$

$\bf{=6.2}$

$\LARGE\boxed{\bf{aesthetic \not1 \theta l}}$

5 0

1 year ago

I need help on the answer

kodGreya [7K]

Answer:

Step-by-step explanation:

First, we have to find 1 percent of 950, then we will multiply it by 8, and then we will add the solution to 950 to see if it exceeds her budge. So:

950/100 = 9.5

9.5 (8) = 76

950 + 76 = 1026

1026 > 1000, so she does not have enough money to but the T.V.

5 0

3 years ago

Which choice is equivalent to the expression below √-81​

Which choice is equivalent to the expression below √-81