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3 years ago

PLS ASAP !!! Help me out please :((

Mathematics

1 answer:

lozanna [386]3 years ago

6 0

Answer:

v = 87.96 cubic mi

Step-by-step explanation:

v = π r^2 h. but diameter is 4 so r =4/2 =2

v = 3.143 * 2^2 * 7

v = 3.143 * 4 *7

v =3.143 *28

v =87.96 cubic mi

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10.55 = as a simplest form

Katarina [22]

Answer:

10 11/20

as a fraction.

Step-by-step explanation:

.55 is 55/100 but can be simplified. 55 and 100 can be divided by 5 so it goes to 11 and 20

5 0

4 years ago

I'm giving brainliest to the most helpful answer. For 50 points:

Alenkinab [10]

Answer:

1) $\displaystyle\frac{5}{18}\approx27.78\%$

2) $\displaystyle\frac{4}{7}\approx57.14\%$

3) $\displaystyle \frac{13}{16}=81.25\%$

Step-by-step explanation:

We are given a two-way frequency table. Using the table, we will determine the probability for each case.

Question 1)

P(A Student With A Part Time Job Without A Car)

Using the first column, the total number of students that have a part time job is 78+30=108.

Likewise, using the first column, we can see that out of those 108 students, 30 do not have a car.

Hence, the probability that a student with a part time job without a car is:

$\displaystyle P=\frac{30}{108}=\frac{5}{18}\approx27.78\%$

Question 2)

P(No Car | Does Not Have A Part Time Job)

Remember that the vertical line means conditional probability.

So, we want the probability of a student having no car given that they do not have a part time job.

Using the second column, we can see that the total number of students that do not have a part time job is 18+24=42.

Likewise, using the second column, 24 do not have a car.

Hence, the probability that a student with a part time job without a car is:

$\displaystyle P=\frac{24}{42}=\frac{4}{7}\approx57.14\%$

Question 3)

P(Part Time Job | Car)

So, we want to probability of a student having a part time job given that they have a car.

Using the first row, the total students that have a car is 78+18=96.

And of those 96 students, 78 have a part time job.

Hence, the probability that a student with a car has a part time job is given by:

$\displaystyle P=\frac{78}{96}=\frac{13}{16}=81.25\%$

4 0

3 years ago

Can someone help me?

Papessa [141]

Answer:

$2x - 2y = 24 \\ 2(x - y) = 24 \\ x = 12 + y......eq(1) \\ 4x + 7y = - 40......eq(2) \\ substituting \: the \: value \: of \: x \: in \: eq(2) \\ 4(12 + y) + 7y = - 40 \\ 48 + 4y + 7y = - 40 \\ 11y = - 40 - 48 \\ y = \frac{ - 88}{11} \\ y = - 8 \\ putting \: the \: value \: of \: y \: im \: eq(1) \\ x = 12 - 8 \\ = 4$

Step-by-step explanation:

3x-2y=24......eqi

x+2y=48........eqii

now solving eq i&ii

4x=72

x=72/4

x=18

now putting the value of x in eqii

18+2y=48

2y=48-18

y=30/2

y=15

7 0

3 years ago

During the last ice age the sea level was ____________ it is today. A) unknown, unlike B) much lower than Eliminate C) much high

allsm [11]

During the last ice age (top) sea level was at least 120 m lower than it is today surprisingly.

5 0

4 years ago

Read 2 more answers

Please help me !!☹️❤️

Andreyy89

Answer:

(x-10) (x+1) =0

x=10 x=-1

Step-by-step explanation:

x^2 -9x-10 =0

Factor

What two numbers multiply to -10 and add to -9

-10*1 = -10

-10+1=-9

(x-10) (x+1) =0

Using the zero product property

x-10 = 0 x+1=0

x-10+10=0+10 x+1-1=0-1

x=10 x=-1

These are the x intercepts

6 0

4 years ago