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2 years ago

Is this the right answer?

Mathematics

2 answers:

vesna_86 [32]2 years ago

6 0

It's not correct.

1 mole = 6.022 * 10^23
12.04*10^23/6.022 * 10^23 = 1.999 moles≈ 2 moles

Viktor [21]2 years ago

5 0

Yes that is correctamundo..............

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What is the square root of -1?

lora16 [44]

Answer:

Step-by-step explanation:

i means imaginary because whatever you try you can't get a number which squared gets a negative number.

4 0

2 years ago

What is the factored form of this expression? 4t2 − 27t + 18

seraphim [82]

Answer:

(4t − 3) (t − 6)

Step-by-step explanation:

Using AC method:

Given a quadratic ax² + bx + c, find factors of ac that add up to b. Divide those factors by a and reduce. The denominators become the coefficients and the numerators become the constants.

Here, a = 4, b = -27, and c = 18.

ac = 4 × 18 = 72

Factors of 72 that add up to -27: -3 and -24

Divide factors by a: -3/4 and -24/4

Reduce: -3/4 and -6/1

So the factored expression is:

(4t − 3) (t − 6)

5 0

2 years ago

PLEASE HELP ASAP!!!!!!!!!!!

marusya05 [52]

Answer:(1) The correct option is b. (2) The correct option is c.

Explanation:

(1)

It is given that the △ABD≅△FEC.

So by (CPCTC) corresponding parts of congruent triangles are congruent.

$\angle CFE=\angle DAB$

It is given that the angle DAB is 63 degree.

$\angle CFE=63^{\circ}$

Therefore, the correct option is b.

(2)

It is given that the △ABD≅△FEC.

So by (CPCTC) corresponding parts of congruent triangles are congruent.

$BD=EC$

$BD=CD+DE$

$BD=8+10$

$BD=18$

Therefore, the correct option is c.

4 0

2 years ago

Read 2 more answers

Help PLZ!!!

Klio2033 [76]

Answer:

36-2n<1/3n+15

Step-by-step explanation:

There are multiple solutions. One solution is 30. Because 30 times 2 is 60 and 36-60 is less than 1/3 of 30 (10) plus 15.

7 0

2 years ago

A random variable follows the continuous uniform distribution between 160 and 340. Calculate the following quantities for the di

Firlakuza [10]

Answer:

a) 0.3889

b) 0.5

c) 0.8333

d) The mean is 250 and the standard deviation is 51.96.

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The probability of finding a value of X higher than x is:

$P(X > x) = 1 - \frac{x - a}{b-a}$

The probability of finding a value of X between c and d is:

$P(c \leq X \leq d) = \frac{d - c}{b - a}$

The mean and the standard deviation are, respectively:

$M = \frac{a+b}{2}$

$S = \sqrt{\frac{b-a}^{2}{12}}$

A random variable follows the continuous uniform distribution between 160 and 340.

This means that $a = 160, b = 340$

$P(220 \leq X \leq 290) = \frac{290 - 220}{340 - 160} = 0.3889$

$P(160 \leq X \leq 250) = \frac{250 - 160}{340 - 160} = 0.5$

$P(X > 190) = 1 - \frac{190 - 160}{340 - 160} = 0.8333$

$M = \frac{160 + 340}{2} = 250$

$S = \sqrt{\frac{340 - 160}^{2}{12}} = 51.96$

The mean is 250 and the standard deviation is 51.96.

8 0

2 years ago