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3 years ago

Please could someone help!

Mathematics

1 answer:

melisa1 [442]3 years ago

8 0

Answer:

<h2> $32.16 \: grams$ </h2>

solution,

$mass = volume \times density \\ \: \: \: \: \: \: \: \: = 2.4 \: \frac{g}{ {cm}^{3} } \times 13.4 \: {cm}^{3} \\ \: \: \: \: \: \: \: \: = 2.4 \times 13.4 \: \: grams \\ \: \: \: \: \: \: \: \: \: \: = 32.16 \: \: grams$

Hope this helps...

Good luck on your assignment..

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Please help with the precalc question above...

Sonja [21]

Answer:

the last choice

Step-by-step explanation:

two functions are said to be inverse when they are symmetric about the line y=x

4 0

3 years ago

Here is a system of linear equations: y= x+4 y= -3x-8

ipn [44]

Answer:

A) (-3,1)

Step-by-step explanation:

<u>Given system of linear equations: </u>

y= x+4
y= -3x-8

---

x + 4 = -3x - 8
x + 3x = - 8 - 4
4x = -12
x = -3

Then

y =-3 + 4 = 1

Solution is (-3, 1)

Correct option is A

5 0

3 years ago

a survey was taken of children between the ages 7 and 12. let A be the event that the person rides the bus to school, and let B

galben [10]

Answer:

The statement is true about whether A and B are independent eventa is fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

Step-by-step explanation:

Let A be the event that the person rides the bus to school, then:

P(A)=75/300

P(A)=0.25

Let B be the event that the person has 3 or more siblings, then:

P(B)=24/300

P(B)=0.25

P(A/B)=9/24

P(A/B)=0.375

Like P(A/B)=0.375 is different to P(A)=0.25 the events are not independent

Answer. Fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

8 0

3 years ago

Read 2 more answers

A bag has 3 red marbles, 3 blue, 4 green and 2 yellow. What is the theoretical probability of pulling a red marble?

svetlana [45]

Answer:

Fraction: $\frac{1}{4}$

Decimal: 0.25

Percentage: 25%

Step-by-step explanation:

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4 0

3 years ago

NEED HELP! The ski lift at Thunder Mountain called Devils Canyon is quite dangerous. Usually 2% of the skiers who attempt the ru

grigory [225]

We will be using the binomial probability formula to solve the problem

The formula is given by ⁿCₓ (p)ˣ (1-p)ⁿ⁻ˣ

Where:
n = the number of trials = 100
x = the number of samples we are trying on = 3
p = the probability of success = 2% = 0.02

We can either calculate ⁿCₓ by using the scientific calculator using the $^nC_r$ button or by doing it manually use $\frac{n!}{(n-x)!x!}$

P(3) = ¹⁰⁰C₃ (0.02)³ (1 - 0.02)¹⁰⁰⁻³
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7 0

3 years ago