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2 years ago

HELP!!!! An 80% confidence interval for a proportion is found to be (0.12,0.18). What is the sample proportion?

Mathematics

2 answers:

jeka57 [31]2 years ago

8 0

Answer: .15

Step-by-step explanation:

Just did it

Jobisdone [24]2 years ago

4 0

Answer: 0.15

Step-by-step explanation:

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How many solutions does the following equation have? 5 x + 8 − 7 x = − 4 x + 1 5x+8−7x=−4x+15, x, plus, 8, minus, 7, x, equals,

UNO [17]

Answer: There is one valid solution to the equation 5x + 8 - 7x = -4x + 1, x = -3.5.

Step-by-step explanation:

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2 years ago

) Set up a double integral for calculating the flux of F=3xi+yj+zk through the part of the surface z=−5x−2y+2 above the triangle

Fynjy0 [20]

The surface (call it $S$ ) is a triangle with vertices at the points

$x=0,y=0\implies z=2\implies(0,0,2)$

$x=0,y=2\implies z=-2\implies(0,2,-2)$

$x=2,y=0\implies z=-8\implies(2,0,-8)$

Parameterize $S$ by

$\vec s(u,v)=(1-v)(2,0,-8)+v\bigg((1-u)(0,2,-2)+u(0,0,2)\bigg)=(2-2v,2v-2uv,-8+6v+4uv)$

with $0\le u\le1$ and $0\le v\le1$ . Take the normal vector to $S$ to be

$\vec s_v\times\vec s_u=(20v,8v,4v)$

Then the flux of $\vec F$ across $S$ is

$\displaystyle\iint_S\vec F(x,y,z)\cdot\mathrm d\vec S=\int_0^1\int_0^1\vec F(x(u,v),y(u,v),z(u,v))\cdot(\vec s_v\times\vec s_u)\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^1\int_0^1(6-6v,2v-2uv,-8+6v+4uv)\cdot(20v,8v,4v)\,\mathrm du\,\mathrm dv$

$=\displaystyle8\int_0^1\int_0^1(11v-10v^2)\,\mathrm du\,\mathrm dv=\boxed{\frac{52}3}$

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3 years ago

Kid need help with homework 2 (8+×)=22

Masja [62]

X=3
$22 \div 2 = 11$
$8 + 3 = 11$

Step By Step:

find x

8 + ? • 2 = 22

22 ÷ 2 = 11

There for x = 3

8 + 3 = 11.

4 0

3 years ago

Read 2 more answers

Wh as t is a prime numbers

Alexeev081 [22]

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers

Step-by-step explanation:

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3 years ago

pls help immediately! this is due in 3 mins :/.(i’ll mark brainiest if u don’t leave a link just help me pls!)

Serhud [2]

Answer:

They help the tree reach deep into the sandy soil for nutrients and ground water.

Step-by-step explanation:

The job of a tree's roots is to collect water and nutrients.

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3 years ago