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NemiM [27]
3 years ago
11

A rectangular blanket is 70 inches long and 48 inches wide. Kim wants to put a border along the edge of the blanket. What is the

least amount of ribbon Kim need to go around the edge of the blanket
Mathematics
1 answer:
prisoha [69]3 years ago
3 0
Kim needs a ribbon that is 6,720 inches long,because 48×70=3360.Then,since there are 4 sides,not just 2,you would have to multiply 3360×2 and that will give you 6720.
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In a sample of 115 115 curtains, the average length was found to be 32.2in. 32.2 ⁢ in. With a standard deviation of 0.8 0.8 . Gi
pentagon [3]

Answer:

The point estimate for the population standard deviation of the length of the curtains is 8.58in.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

s = 0.8, n = 115

The point estimate for the population standard deviation of the length of the curtains is \sigma. So

s = \frac{\sigma}{\sqrt{n}}

\sigma = s\sqrt{n}

\sigma = 0.8\sqrt{115}

\sigma = 8.58

The point estimate for the population standard deviation of the length of the curtains is 8.58in.

3 0
3 years ago
Dylan owes half as much money as he used to owe. If he used to owe $28, which of the following expressions would reflect how muc
Ivahew [28]
28/2 or 28 x (1/2)
You can either divide $28 by 2 or multiply it by (1/2)
3 0
3 years ago
6(x + 1) = -2(3x + 9)​
Svetach [21]

Answer:

x=-2

Step-by-step explanation:

6(x + 1) = -2(3x + 9)​

Distribute 6 and -2.

6x+6=-6x-18

Move the variable to the left-hand side and move the constant to the right and change their signs.

6x+6x=-18-6

Collect like terms.

12x=-24

Divide both sides of the equation by 12.

x=-2

Hope this helps :)

5 0
3 years ago
Read 2 more answers
PLEASE HELP AND PLEASE MAKE YOUR EXPLANATION DETAILED!!!
wel

Answer:

18

Step-by-step explanation:

168 : 28 : : 108 : y

168 / 28 = 108 / y

6 = 108 / y

6 * y = 108

y = 108 / 6

y = 18

5 0
3 years ago
Read 2 more answers
Sara threw her math book off a building . The height of the book, seconds after being thrownis modeled by the equation below. Th
Vikentia [17]

Answer: 70 ft

Step-by-step explanation:

Given

height of book is measured by the function is

h(x)=-5(x+2)(x-7)

when the book is thrown x=0

\therefore h(x=0)=-5(0+2)(0-7)\\\Rightarrow h(x=0)=70\ ft

The height of the book is 70\ ft

4 0
3 years ago
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