Answer:
2.777777...
Step-by-step explanation:
Answer:
2 m
Step-by-step explanation:
The length and width of a rectangular garden is 10 m and 3 m respectively.
He will double the area of the garden by adding the same number of meters to both the length and the width. Area = 2(10 × 3) = 60 m².
Let x is amount of increase in the length and width such that area will be :
(10+x)(3+x) =60
30+10x+3x+x² = 60
x²+13x-30=0
x²+15x-2x-30=0
x(x+15)-2(x+15)=0
x=2 and x = -15
Neglecting negative value, he aded 2 m toboth length and width of the garden.
Answer:
84
Step-by-step explanation:
68 + 100 = 168
168/2 = 84
Answer:
7/9
Step-by-step explanation:
9/9 = 1 whole
2+7 = 9
bolts of length more than
, and less than
will be destroyed
= 13.20 cm and 12.80 cm
<u>Step-by-step explanation:</u>
Here we have , A manufacturer of bolts has a quality-control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. The quality-control engineer knows that the bolts coming off the assembly line have mean length of 13 cm with a standard deviation of 0.10 cm. We need to find For what lengths will a bolt be destroyed .Let's find out:
A manufacturer of bolts has a quality control policy that requires it destroy any bolts that are more than 2 standard deviations from the mean.
mean length= 
standard deviation= 
2 standard deviation from mean= 
Therefore, bolts of length more than
, and less than
will be destroyed
= 13.20 cm and 12.80 cm