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3 years ago

Find the critical value ze necessary to form a confidence interval at the level of confidence shown below

Mathematics

1 answer:

allsm [11]3 years ago

6 0

Answer:

1.31

Step-by-step explanation:

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1384792 round each number to the place of underline digit is 8

Pepsi [2]

The answer would be 1380000

8 0

3 years ago

A stack of 6 bricks is 2 feet high. How high is a stack of 20 bricks?

Korolek [52]

60.

The question gives you the fact that 6 bricks is 2 feet high.

What do you do to get from 2 to 20?
You multiply by 10.

Since you multiplied one thing by 10, you must do it to the other side so it remains balanced.

2 ft x 10ft = 20ft

6 bricks x 10 bricks = 60 bricks

8 0

3 years ago

The population of rabbits on an island is growing exponentially. In the year 1991, the population of rabbits was 9100, and by 19

lisabon 2012 [21]

Answer:

$39,223\ rabbits$

Step-by-step explanation:

we know that

The equation of a exponential growth function is given by

$y=a(1+r)^x$

where

y is the population of rabbits

x is the number of years since 1991

a is the initial value

r is the rate of change

we have

$a=9,100$

substitute

$y=9,100(1+r)^x$

For the year 1998

the number of years is equal to

x=1998-1991=7 years

we have the ordered pair (7,18,000)

substitute in the exponential equation and solve for r

$18,000=9,100(1+r)^7$

$(18,000/9,100)=(1+r)^7$

elevated both sides to 1/7

$(1+r)=1.1023$

$r=0.1023$

therefore

$y=9,100(1+0.1023)^x$

$y=9,100(1.1023)^x$

Predict the population of rabbits in the year 2006

Find the value of x

x=2006-1991=15 years

substitute the value of x in the equation

$y=9,100(1.1023)^{15}$

$y=39,223\ rabbits$

6 0

3 years ago

Vince worked 675 hours in 15 weeks. At what rate did he work in hours per week?

NNADVOKAT [17]

Answer:

45 hours a week

Step-by-step explanation:

Ok, so we know that he worked 675 hours in 15 weeks.

So all we need to do is divide the hours by the amount of weeks, which is 15:

675/15= 45

So he worked 45 hours a week!

6 0

3 years ago

Write an equation for the line that is parallel to y = −2x and passes through the point (0,7).

lesya [120]

Answer:

B. $\displaystyle y = -2x + 7$

Step-by-step explanation:

The y-intercept is given to us, which is $\displaystyle [0, 7],$ and Parallel Lines have SIMILAR RATE OF CHANGES [SLOPES], so −2 remains the way it is.

I am joyous to assist you anytime.

8 0

3 years ago