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3 years ago

A student earned 23 out of 30 points on a quiz. What percent of the points did the student earn?

1 answer:

german3 years ago

4 0

Hi!

We can set up a proportion to answer this.

$\frac{23}{30} \frac{x}{100}$

To solve for x, cross-multiply.

23 x 100 = 2300
2300/30 = 76.67

The answer is 76.67%

Hope this helps! :)

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Kazeer [188]

Your answer is 3 1/3

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3 years ago

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Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Gala

umka21 [38]

Answer:

a) 0.264

b) 48 cubit light-years

Step-by-step explanation:

For calculating a) What is the probability of 3 or more stars in 16 cubic light years?

λ= 1 star/16 cubic light-years

t= measure t in units of 16 cubic light years.

E(Y) = λ t = (1/16)(16) = 1 star

P(X>=2) = 1 - P(X<2)

= 1 - [e^-1 + (e^-1)(1)/1!]

= 0.264

P(X≥1) = 1 - P(X=0)

= 1 - e^-μ

0.95 = 1 - e^-μ

e^-μ = 1 - 0.95

e^-μ = 0.05

ln(e^-μ) = ln(0.05)

-μ = -3

μ = 3

Therefore 3 x 16 = 48 cubic light years of space

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3 years ago

Atrice needs to find a container that will hold at least 300 cubic Inches of water. Which of these figures could atrice use

Tju [1.3M]

Answer:I think it’s answer B

Step-by-step explanation:because if you measure figure 2 it will be about 451 and you need it to hold about 300 so it can’t be a or c and figure 3 holds about 321 while figure 1 holds about something so I think it’s B

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3 years ago

Is the statement below always something or never true give at least two examples to support your reasoning the LCM of two number

Mashcka [7]

Answer:

Sometimes, it is true

Step-by-step explanation:

The L. C. M of two numbers could be the product of the two Given numbers. This happens sometimes but not always. For instance, the Lowest Common. Multiple of 4 and 5 is 20

4 : 4, 8, 12, 16, 20, 24, 28, 32

5 : 5, 10, 15, 20, 25,...

L. C. M = 20 ; 4 * 5 = 20

However, L. C. M of 4 and 8

4 : 4, 8, 12, 16, 20, 24, 28, 32

8 : 8, 16, 24, 32, 40

L.C.M = 8 ; 4 * 8 = 32

HENCE, L. C. M could be the product of the 2 numbers sometimes and it may not in other scenarios.

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2 years ago

Which quadrilateral has one pair of parallel sides, but is not a parallelogram?.

Andreas93 [3]

Only the trapezoid has one pair of parallel side while all the other quadrilateral( in this question) square, rhombus and rectangle has two pair of parallel sides.

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1 year ago