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3 years ago

PLEASE SHOW YOUR WORK. HURRY I WILL MARK YOU BRAINLIEST

Mathematics

2 answers:

blagie [28]3 years ago

5 0

Answer:

The Answer is 112

Step-by-step explanation:

Hello, allow me to explain,

so the information given is $2 per chocolate bar, 24 chocolate bars were bought in 3 days, how much in 7 days

1. I divided 24 by 3 to find how many bars get sold in 1 day

24÷3=8

2. I multiply the 8 by the 2 to find how much money is made in 1 day

8×2=16

3. I multiply to find the amount of money for that week

16×7=112

Therefore my answer is $112.00 

Hope I could help!!

-Nova

Vedmedyk [2.9K]3 years ago

3 0

Answer:

Step-by-step explanation:its is b because in three days they earn 48 dollars in 6 days the earn 96 dollars in 7 days they earn 112 dollars so it is b

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A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with A random s

wel

Answer:

95%: (3278.354 ; 3270.083)

99% : (3221.646 ; 3278.354)

Step-by-step explanation:

Given :

Sample size, n = 12

Mean, xbar = 3250

Sample standard deviation = √1000

The 95% confidence interval :

Mean ± Margin of error

Margin of Error = Tcritical * s/√n

Tcritical at 0.05, df=12-1 = 11 ;

Tcritical at 95% = 2.20

Hence,

Margin of Error = (2.20 * √1000/√12) = 20.083

Confidence interval : 3250 ± 20.083

Lower boundary = 3250 - 20.083 = 3229.917

Upper boundary = 3250 + 20.083 = 3270.083

2.)

The 99% confidence interval :

Mean ± Margin of error

Margin of Error = Tcritical * s/√n

Tcritical at 0.01, df=12-1 = 11 ;

Tcritical at 99% = 3.106

Hence,

Margin of Error = (3.106 * √1000/√12) = 28.354

Confidence interval : 3250 ± 28.354

Lower boundary = 3250 - 28.354 = 3221.646

Upper boundary = 3250 + 28.354 = 3278.354

3 0

3 years ago

Find any points of discontinuity for each rational function. Sketch a graph. Describe any verticals or horizontal asympyoyes and

AVprozaik [17]

For
y = (x^2 -4)/((x +2)(x^2 -49))
the numerator factors to (x -2)(x +2), so the factor of (x +2) will cancel with that in the denominator, leaving
y = (x -2)/(x^2 -49)

There are points of discontinuity at the hole, x=-2, and at each of the vertical asymptotes, at x=-7, +7.
The horizontal asymptote is y=0.