Answer:
<h2>9/28</h2>
Step-by-step explanation:
<em><u>2 3/7 - 1 1/4</u></em>
<em><u>2 3/7 - 1 1/4First turn the two mixed numbers into improper fraction:</u></em>
<em><u>2 3/7 - 1 1/4First turn the two mixed numbers into improper fraction:17/7 - 5/4</u></em>
<em><u>2 3/7 - 1 1/4First turn the two mixed numbers into improper fraction:17/7 - 5/4Next find the Lowest Common Denominator:</u></em>
<em><u>L.C.D = 28</u></em>
<em><u>L.C.D = 2821 - 12/28</u></em>
<em><u>L.C.D = 2821 - 12/28= 9/28</u></em>
<u>It won't be a mixed number because the denominator is bigger than the numerator.</u>
Answer:
a. (0.6178, 5.1622)
b. (0.2637, 0.5592)
c.
Step-by-step explanation:
A.
For lead
n1 = 10
X1 = 2.89
S1 = 3.92
90% ci = 1-90%
= 0.10
TCritical = 1.833
Degree of freedom = 10-1 = 9
X1 +- TCritical * s/√n
= 2.88 +-1.833x3.92/√10
= 2.89+-2.2722
= 0.6178, 5.1622
Lead in water lies between this interval at 90% confidence level.
For cooper
n2 = 10
X2 = 0.4083
S2 = 0.2495
Alpha = 0.10
Df = 9
TCritical = 1.833
0.4083+-1.833*9.2495/√10
= 0.4084+-0.14462
= (0.26368, 0.55292)
Copper in water lies between this interval at 90% confidence level
C.
Underlying assumptions
The samples are randomly taken as well as independent. The sample size is not big enough. So it is approximately normally distributed.
Answer:
66.4 cm is the perimeter
Step-by-step explanation:
You just add everything together !
Answer:
he took 4 of his friends to the movies
Step-by-step explanation:
by adding 9.50+7.25+7.25+7.25+7.25