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2 years ago

Please answer it’s due tomorrow

Mathematics

1 answer:

Goryan [66]2 years ago

3 0

1,080 miles

The Mackenzie River is a river in the Canadian boreal forest.
It is the longest river system in Canada. Basin size, 1,805,200 km2 (697,000 sq mi) .
The river's main stem is 1,738 kilometres (1,080 mi) long, flowing north-northwest from that of the Mackenzie River is Thutade Lake, in the Northern Interior of British Columbia.

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A psychological researcher did a study with a sample of 84 boys and found that the meam length of time that they remained engage

Varvara68 [4.7K]

Sample size= n= 84
sample mean= x = 107 s
population standard deviation =σ= 11.7

As, population standard deviation is given so we use the estimate:
x(+/-) z(α/2)(σ/√n)

At 99% Confidence interval means significance level is α=1-0.99= 0.01
So,
α/2=0.005
Now, z at α/2=0.005
z= 2.576
Now, by putting values
107(+/-)((2.576)(11.7/√84))
( 107-((2.576)(11.7/√84)), 107+((2.576)(11.7/√84)) )
(103.7, 110.288)

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3 years ago

What is the value of the expression -38-16-(-23)? O-31 O-45 O-54 O-77

ohaa [14]

Answer:

-31

Step-by-step explanation:

$-38-16-(-23) \\ \\ =-38-16+23 \\ \\ =-54+23 \\ \\ =-31$

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1 year ago

Can someone help with this question??

Step2247 [10]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A bus driver started her day with an empty bus. At her first stop she picked up

lidiya [134]

Answer:

12 people.

Step-by-step explanation:

Let's do this one at a time.

First stop:

0 + 11 = 11

Second stop:

11 + 5 = 16.

16 - 7 = 9.

Third stop:

9 + 5 = 14.

14 - 2 = 12.

There were 12 people on the bus after the driver left the third stop.

8 0

2 years ago

What is the equation of a line with slope -2 and passes through the point (0, 3)?

kramer

The equation that you are looking for is y = -2x + 3

5 0

3 years ago