3 years ago

I need help with number 3

1 answer:

6 0

Answer:

Step-by-step explanation:

You might be interested in

Ivan

It's $x^{2} +6x+1
/x(x+2)$ because this choice made the most since.

4 0

2 years ago

alisha [4.7K]

Answer:

Lower limit = 1007.95 cm/s

Upper limit = 1142.05 cm/s

Step-by-step explanation:

We have to calculate a 95% CI with population's standard deviation known.

The sample is size n=60, with mean M=1075.

The confidence interval can be expressed as:

$M-z*\sigma/\sqrt{n} \leq\mu\leq M+z*\sigma/\sqrt{n}$

For a 95% CI, the value of z=1.96.

$1075-1.96*265/\sqrt{60} \leq\mu\leq 1075+1.96*265/\sqrt{60} \\\\1075-67.05 \leq\mu\leq 1075+67.05\\\\ 1007.95 \leq\mu\leq 1142.05$

8 0

3 years ago

qaws [65]

Answer:

12 square units.

Step-by-step explanation:

5 0

2 years ago

rodikova [14]

Well, we see that it is a straight line
so the derivitive would be perpendicular
5/4 times what=-1
-4/5

the slope is -4/5

7 0

2 years ago

Brilliant_brown [7]

Dot product is
a*b = |a|*|b|*cosα.
In our case
u*u =|u|*|u|*cos 0
u*u =|u|*|u|
12=|u|²
|u|=√12=√(4*3)=2√3
Answer: <span>D. 2√3</span>

5 0

3 years ago