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3 years ago

What does 3e-6 mean on the calculator?

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

3 0

it means 3 and then "e" means is up of the 3so its 3↖-6

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What are the solutions of the equation x4 + 3x2 + 2 = 0? Use u substitution to solve.

Julli [10]

ANSWER

$x = \: x = \pm \: \sqrt{2} i \: or \: x = \pm \: i$

EXPLANATION

${x}^{4} + 3 {x}^{2} + 2 = 0$

${ ({x}^{2}) }^{2} + 3( {x}^{2}) + 2 = 0$

Let

$u = {x}^{2}$

Then the equation becomes:

${u}^{2} + 3u + 2 = 0$

${u}^{2} + 2u +u + 2 = 0$

Factor:

${u}(u + 2)+ 1(u + 2) = 0$

$(u + 1)(u + 2) = 0$

$u = - 1$

$u = - 2$

This implies that

${x}^{2} = - 1 \implies \: x = \pm \: i$

${x}^{2} = - 2 \implies \: x = \pm \: \sqrt{2} i$

3 0

2 years ago

Based on data from the Greater New York Blood Program, when blood donors are randomly selected the probability of the having Gro

Gnesinka [82]

Answer:

The probability that at least one of the 5 donors has Group O blood type is 0.9497.

Step-by-step explanation:

We can model this as a binomial random variable, with n=5 (the sample size) and p=0.45.

The probability that exactly k donors have Group O blood type in the sample can be written as:

$P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{5}{k} 0.45^{k} 0.55^{5-k}\\\\\\$

We have to calculate the probability P(x≥1). In this case it easy to substract from 1 the probabitity that x is exactly 0:

$P(X\geq1)=1-P(x=0)\\\\\\P(x=0) = \dbinom{5}{0} p^{0}(1-p)^{5}=0.55^5=0.0503\\\\\\P(x\geq1)=1-0.0503=0.9497$

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3 years ago

Witch is bigger 8 meters or 80 centimeters

masha68 [24]

Answer:

8 meters

Step-by-step explanation:

80 centimeters is like a one hundredth of 8 meters

8 0

2 years ago

Please help me wonderful people! its math!!

Westkost [7]

Where the blue scribble is!

3 0

2 years ago

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The diameter of a circle is 6 centimeters. What is the circle's area?<br><br> Use 3.14 for pi

Lynna [10]

Step-by-step explanation:

diameter=

$2 \times\pi \times r = 6 \\ r = \frac{6}{2 \times 3.14} = 0.955 \\ area = \pi \times {r}^{2} = 3.14 \times {0.955}^{2} \\ = 2.87\: {cm}^{2}$

7 0

2 years ago

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