3 years ago

Which number is rational? square root 2 3.4 square root 10 square root 16

Mathematics

1 answer:

IRINA_888 [86]3 years ago

3 0

Answer:

3.4

Step-by-step explanation:

3.4 is able to be converted into a fraction so it is rational.

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What is the residual value when x = 4? -6.72 -0.58 0.58 6.72

madreJ [45]

Answer:

Brainliest

Step-by-step explanation:

y=2.78(4)-4.4 = 6.72

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3 years ago

Keisha makes a large sandwich for family picnic. She takes 1/2 of the sandwich to the picnic. At the picnic, her family eats 3/8

Mumz [18]

Keisha brings back 1/8th of the sandwich

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3 years ago

Write a division problem that has a quotient of 1/20

alexdok [17]

Answer:

5 divided by 100

Step-by-step explanation

5 divided by 100 is 0.05 but as a fraction, it's 1/20

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3 years ago

F(x) = 2x^2+ 5x + 20 Find f(-9)

8_murik_8 [283]

Answer:

137

Step-by-step explanation:

2(-9)^2+5(-9)+20

2(81)-45+20

162-45+20

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137

8 0

3 years ago

An analyst from an energy research institute in California wishes to precisely estimate a 99% confidence interval of the average

Lena [83]

Answer:

190

Step-by-step explanation:

Data provided in the question:

Confidence level = 99%

Therefore,

α = 1% = 0.01

[ from standard normal table ]

z-value for $z_{\frac{\alpha}{2}}= z_{\frac{0.01}{2}}=$ = 2.58

Margin of error, E = $0.06

Standard deviation, σ = $0.32

Now,

n = $(\frac{z_{0.005}\sigma}{E})^2$

Here,

n is the sample size (or the minimum number of gas stations )

on substituting the respective values, we get

= $(\frac{z_{0.005}\sigma}{E})^2$

= $(\frac{2.58\times0.32}{0.06})^2$

= 13.76²

= 189.3376 ≈ 190

Hence,

minimum number of gas stations that she should include in her sample is 190

5 0

3 years ago