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3 years ago

Question

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

8 0

Answer:

$d=7.8\ g/cm^3$

Step-by-step explanation:

Given that,

The dimensions of a rectangular block = 4 cm x 2 cm x 1.5 cm

Mass, m = 93.6 g

We need to find the density of steel. We know that the density of an object is equal to the mass divided by volume. So,

$d=\dfrac{m}{V}\\\\d=\dfrac{93.6}{4\times 2\times 1.5}\\\\d=7.8\ g/cm^3$

So, the density of the steel is $7.8\ g/cm^3$ .

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In a math class with 27 students, a test was given the same day that an assignment was due. There were 17 students who passed th

timama [110]

Answer:

The probability that a student who completed the homework failed the test is 0.211.

Step-by-step explanation:

The probability of an event E is the ratio of the favorable number of outcomes to the total number of outcomes.

$P(E)=\frac{n(E)}{N}$

The conditional probability of an event A given that another event B has already occurred is:

$P(A|B)=\frac{P(A\cap B)}{P(B)}$

Denote the events as follows:

P = a student passes the test

F = a student fails the test

X = a student completes the assignment

Y = a student does not completes the assignment

From the information provided the summary table is as follows:

P F Total

X 15 4 19

Y 2 6 8

Total 17 10 27

Compute the probability that a student completed the assignment and failed the test as follows:

$P(X\cap F)=\frac{n (X\cap F)}{N}=\frac{4}{27}$

Compute the probability that a student completed the assignment as follows:

$P(X)=\farc{19}{27}$

Compute the probability that a student failing the test given that the student completed the assignment as follows:

$P(F|X)=\frac{P(X\cap F)}{P(X)}=\frac{4/27}{19/27}=\frac{4}{19}=0.21053\approx 0.211$

Thus, the probability that a student who completed the homework failed the test is 0.211.

7 0

3 years ago

1.23/16 prosto do matury potrzebuję pomocy!

Anestetic [448]

1.23/16 = 0.076875 . totally answer

7 0

3 years ago

What is 7/5 divided by 3/10

Mazyrski [523]

Answer:

$\frac{11}{10}$ or 1 $\frac{1}{10}$

Step-by-step explanation:

$\frac{7}{5}$ ÷ $\frac{3}{10}$

= $\frac{(7 * 10) - (3 * 5)}{5 * 10}$

= $\frac{55}{50}$

= $\frac{55 / 5}{50 / 5}$

= $\frac{11}{10}$ or 1 $\frac{1}{10}$

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4 years ago

Christy rented a banquet hall for her company party. There was a non-refundable deposit of $300 to reserve the space and an $85

rusak2 [61]

Answer:

Step-by-step explanation:

300 to reserve + 85 fee = 385, plus 27 per person or (27b) which equals 2,653. 27b + 385= 2,653. solve the equation for b and the answer is 84

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4 years ago

Joan walked 50 dogs this week. 40% of the dogs were brown. How many dogs were brown?

VMariaS [17]

Answer: 20

Step-by-step explanation:

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3 years ago