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koban [17]
3 years ago
7

You roll two number cubes. What is the probability of rolling double threes?

Mathematics
1 answer:
ivann1987 [24]3 years ago
7 0

Answer:

2/36 or 5.5555555555 is the probability

Step-by-step explanation:

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A rectangular plot of ground is 30 meters longer than it is wide. its area is 10,000 square meters.
dimulka [17.4K]
A = W· L
10,000 = W ( W +30 ) = W² + 30 W
W² + 30 W - 10,000 = 0
W = \frac{-30+ \sqrt{900+40000} }{2}=  \frac{-30+202.24}{2} = 86.12
L = 86.12 + 30 = 116.12
Width of a plot is 86.12 m and lenght is 116.12 m.
Check : A = 116.12 · 86.12 ≈ 10,000
6 0
3 years ago
stat: sample of 780 adults in the U.S.A., it was found that 80 of those had a pinworm infestation. You want to find the 99% conf
Anettt [7]

Answer: 554

Step-by-step explanation:

If prior population proportion is known, then the formula to find the sample size is given by :-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2

As per given description, we have

p= 0.1

E=0.025

Critical z-value for 95% confidence : z_{\alpha/2}=1.96

Then,

n=0.1(1-0.1)(\dfrac{1.96}{0.025})^2=553.1904\approx554

Hence, the minimum sample size required = 554.

7 0
3 years ago
16+5×4÷2=42 <br><br>insert parentheses to make the statement true
Nat2105 [25]
(16+5)4÷2=42
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5 0
3 years ago
At a theme park, 35% of daily visitors ride the log ride. If on one particular day the park has 60,000 visitors, how many can be
Neko [114]
The answers is D 21,000because you have to do 60,000x.35=21,000
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hope this answer helps you dear...take care!

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