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sdas [7]
3 years ago
15

Find the perimeter of a rectangle with a length of 8.4 inches and a width of 12.2 inches.

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
8 0

Answer: 20.6

Step-by-step explanation: your suppose to add 12.2+8.4 because your doing perimeter and not area because area is when you multiply.

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Help please thank you!
Maslowich

the error is that they didnt add the exponets

6 0
3 years ago
The tensile strength of a metal part is normally distributed with mean 40 pounds and standard deviation 5 pounds. If 50,000 part
nalin [4]

Answer:

a) how many would you expect to fail to meet a minimum specification limit of 35-pounds tensile strength?

7933 parts

b) How many would have a tensile strength in excess of 48 pounds?

2739.95 parts

Step-by-step explanation:

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

a) how many would you expect to fail to meet a minimum specification limit of 35-pounds tensile strength?

z = (x-μ)/σ

x = 35 μ = 40 , σ = 5

z = 35 - 40/5

= -5/-5

= -1

Determining the Probability value from Z-Table:

P(x<35) = 0.15866

Converting to percentage = 15.866%

We are asked how many will fail to meet this specification

We have 50,000 parts

Hence,

15.866% of 50,000 parts will fail to meet the specification

= 15.866% of 50,000

= 7933 parts

Therefore, 7933 parts will fail to meet the specifications.

b) How many would have a tensile strength in excess of 48 pounds?

z = (x-μ)/σ

x = 48 μ = 40 , σ = 5

z = 48 - 40/5

z = 8/5

z = 1.6

P-value from Z-Table:

P(x<48) = 0.9452

P(x>48) = 1 - P(x<48)

1 - 0.9452

= 0.054799

Converting to percentage

= 5.4799%

Therefore, 5.4799% will have an excess of (or will be greater than) 48 pounds

We are asked, how many would have a tensile strength in excess of 48 pounds?

This would be 5.4799% of 50,000 parts

= 5.4799% × 50,000

= 2739.95

Therefore, 2739.95 parts will have a tensile strength excess of 48 pounds

4 0
3 years ago
PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Strike441 [17]

I hope this is right

220.5 cubic feet

3 0
3 years ago
Plzzzzz help meee i do not know it
Andrej [43]

Answer:

70 cubic cenimeters

Step-by-step explanation:

please give brianly!

7 0
2 years ago
327.46 written in expanded form
Ivenika [448]
Expanded form is like this 300 plus 20 plus 7 plus .40 plus .6
3 0
3 years ago
Read 2 more answers
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