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Lilit [14]
2 years ago
8

There are 1 1/3 pounds of bricks in a bag. Each brick weighs 2/3 of a pound. How many

Mathematics
2 answers:
Alexus [3.1K]2 years ago
4 0

Answer:

There are two bricks in the bag.

Step-by-step explanation:

1 1/3 can be written as 4/3 bricks in a bag.

(4/3)/(2/3) = 2

There are two bricks in the bag.

Gnoma [55]2 years ago
4 0

Answer:

2

Step-by-step explanation:

1 is 2/3

2 is 4/3 which is same as 1 1/3

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A physicist examines 25 water samples for nitrate concentration. The mean nitrate concentration for the sample data is 0.165 cc/
xz_007 [3.2K]

Answer:

The 80% confidence interval for the the population mean nitrate concentration is (0.144, 0.186).

Critical value t=1.318

Step-by-step explanation:

We have to calculate a 80% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=0.165.

The sample size is N=25.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

s_M=\dfrac{s}{\sqrt{N}}=\dfrac{0.078}{\sqrt{25}}=\dfrac{0.078}{5}=0.016

The degrees of freedom for this sample size are:

df=n-1=25-1=24

The t-value for a 80% confidence interval and 24 degrees of freedom is t=1.318.

The margin of error (MOE) can be calculated as:

MOE=t\cdot s_M=1.318 \cdot 0.016=0.021

Then, the lower and upper bounds of the confidence interval are:

LL=M-t \cdot s_M = 0.165-0.021=0.144\\\\UL=M+t \cdot s_M = 0.165+0.021=0.186

The 80% confidence interval for the population mean nitrate concentration is (0.144, 0.186).

6 0
3 years ago
A pig wights 9.8 pounds convert the pigs wight to ounces
Elodia [21]
9.8 pounds in ounces is 156.8
Hope this helped!!
5 0
3 years ago
What’s the exponent form of 2*2*5*5
san4es73 [151]

Answer:

The answer is 100

Step-by-step explanation:

2 times 2=4    4 times 5=20   20 times 5/5 times 2=10 then add a zero

6 0
3 years ago
Given: ΔABC. If ∠B = 35°, a = 4.5 cm, and b = 6.0 cm, what is the measurement of ∠A to the nearest tenth of a degree?
soldier1979 [14.2K]
We know that

the law of sines established 
a/sin A=b/sin B--------sin A=[a*sin B]/b
a=4.5 cm
b=6 cm
B=35°
so
sin A=[4.5*sin 35°]/6-----> sin A=0.43018
A=arc sin(0.43018)-------> A=25.5°

the answer is the option
<span>C) 25.5° </span>


6 0
3 years ago
7w+8p for w= 4 and p=5
stiks02 [169]
Plug it in

7(4) + 8(5) which would be 28 + 40

Answer: 68
7 0
3 years ago
Read 2 more answers
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