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svlad2 [7]
3 years ago
15

Blueberries are on sale for $2.80 per pint. The regular price is $3.50 per pint. What is the percent of decrease? Select from th

e drop-down menu to correctly complete the statement.
0.2
0.25
0.7
20
25
70
Mathematics
2 answers:
Murljashka [212]3 years ago
7 0
The answer is 0.7
enjoy brainy
homepage10
Flura [38]3 years ago
5 0

Answer:

it is 20% can you mark me brainless

Step-by-step explanation:

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If f(x) is discontinuous, determine the reason. f(x)= {x^2 +4, x<=1; x+3, x>1}
tester [92]

Answer:

Observe that f(x) is a continuous function when x1 because is a polynomial. The possible problem may occur in x=1.

Then, f(x) is discontinuous in x=1 if the limits of f to the right and the left of 1 exist and are different or if some of those limits doesn't exist.

Let's calculate the limits:

lim_{x\rightarrow 1^+}f(x)=lim_{x\rightarrow 1}(x+3)=1+3=4

lim_{x\rightarrow 1^-}f(x)=lim_{x\rightarrow 1^-}(x^2+4)=1^2+4=5

Since, lim_{x\rightarrow 1^-}\neq lim_{x\rightarrow 1^+} then f(x) is discontinuous in x=1.

6 0
3 years ago
Find the following for the given pyramid: Slant height, lateral area, surface area, and volume. Please show all work!
jolli1 [7]
You have:
 1)The slant height is:
 Slant height=√[(8 inches)²+(8 inches)²]
 Slant height=10 inches
 2)The lateral area is:
 LA=(Perimeter)(Slant height)/2
 LA=(6 inches)(4)(10 inches)/2
 LA=120 inches²
 3)The Surface area is:
 SA=Base area+(PerimeterxSlant height/2)
 SA=(6 inches)²+(24 inchesx10 inches/2)
 SA=156 inches²
 4)The volume is:
 V=(6 inches)²(8 inches/3)
 V=96 inches³
5 0
3 years ago
Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing four red marbles, three green ones, fo
NeTakaya
In this question, Suzan is taking 5 marble from a bag containing 4 red marbles, 3 green ones, 4 white ones, and 3 purple ones. The total marble in the bag should be: 4+3+4+3= 14. The question is how much the probability to get <span>1 red, 2 green, 1 white and 1 purple.

Ways to take 5 marble out of 14=14C5= 14!/5!9!= </span>2002<span>
 
</span>Ways to take 1 red marble out of 4= 4C1= 4<span>

</span>Ways to take 2 green marble out of 3= 3C2= 3

Ways to take 1 white marble out of 4= 4C1= 4

Ways to take 1 purple  marble out of 3= 3C1= 3

Then the probability would be: 4*3*4*3/ 2002= 144/2002= 72/1001
5 0
3 years ago
A student researcher compares the heights of men and women from the student body of a certain college in order to estimate the d
maria [59]

Answer:

(0.6613, 8.3387)

Step-by-step explanation:

Let the heights of men be the first population and the heights of women be the second population. Then

We have n_{1} = 15, \bar{x}_{1} = 69.4, s_{1} = 3.09 and

n_{2} = 7, \bar{x}_{2} = 64.9, s_{2} = 2.58. The pooled

estimate is given by  

s_{p}^{2} = \frac{(n_{1}-1)s_{1}^{2}+(n_{2}-1)s_{2}^{2}}{n_{1}+n_{2}-2} = \frac{(15-1)(3.09)^{2}+(7-1)(2.58)^{2}}{15+7-2} = 8.68

The 99% confidence interval for the true mean difference between the mean height of the men and the mean height of the women is given by (if the samples are independent)

(\bar{x}_{1}-\bar{x}_{2})\pm t_{0.01/2}s_{p}\sqrt{\frac{1}{15}+\frac{1}{7}}, i.e.,

(69.4-64.9)\pm t_{0.005}2.946\sqrt{\frac{1}{15}+\frac{1}{7}}

where t_{0.005} is the 0.5th quantile of the t distribution with (15+7-2) = 20 degrees of freedom. So  

4.5\pm(-2.845)(2.946)(0.458), i.e.,

(0.6613, 8.3387)

5 0
3 years ago
What is the constant of proportionality in this proportional relationship?
ArbitrLikvidat [17]

Answer:

Sorry, I'm late but it's \frac{5}{12} Hope this helps :D

Step-by-step explanation:

I took the test

5 0
3 years ago
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