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4 years ago

0.75x10= what is the answer.

Mathematics

2 answers:

ahrayia [7]4 years ago

7 0

Answer:

7.5

Step-by-step explanation:

Anything times 10 you should just add an invisible digit to the end and move everything one over. That way from 0.75, you can get 7.5.

kvv77 [185]4 years ago

6 0

Answer:

7.5

Step-by-step explanation:

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3 years ago

A 95 percent confidence interval for the mean of a population is to be constructedand must be accurate within 0.3 unit. A prelim

jarptica [38.1K]

Answer:

B. 359

Step-by-step explanation:

Given that:

The margin of error (e) must be within 0.3 unit, The standard deviation (σ) = 2.9 and the the confidence level = 95% = 0.95

α = 1 =0.95 = 0.05

$\frac{\alpha}{2}=\frac{0.05}{2}=0.025$

The z score of 0.025 corresponds to the z score of 0.0475 (0.5 - 0.025) which can be gotten from the normal probability table.

Therefore: $z_\frac{\alpha}{2}= z_{0.025}=1.96$

The formula for the margin of error is given by:

$e=z_{0.025}\frac{\sigma}{\sqrt{n} } \\Substituting:\\0.3=1.96*\frac{2.9}{\sqrt{n} } \\\sqrt{n}=\frac{1.96*2.9}{0.3}\\\sqrt{n} =18.95\\ n=18.95^2=359$

Therefore the smallest sample size (n) is 359

5 0

3 years ago

Simplify (4x^3+13x-7) -(6x^2+9x+2)

svetoff [14.1K]

$(4x^{3}+13x-7)-(6x^{2}+9x+2)\\\\=4x^{3}+13x-7-6x^{2}-9x-2\\\\=4x^{3}-6x^{2}+(13-9)x+(-7-2)\\\\=4x^{3}-6x^{2}+4x-9$

8 0

3 years ago

When measuring volume of a cone, if the line goes all the way across the base, define this current value (what is the term for t

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Step-by-step explanation:

6 0

3 years ago

A contractor wants to rent a wood chipper from Acme Rental for a day for $118 plus $11 per hour or from Bell Rental for a day fo

Helga [31]

Answer:

$C(x) = 118 + 11 x$ -- Acme

$C(x) = 128 + 9 x$ --- Bell

Step-by-step explanation:

Given

Acme:

$Daily = 118$

$Hourly = 11$

Bell:

$Daily = 128$

$Hourly = 9$

Required

Determine the cost function for both

The cost function can be determined using the following illustrations:

Daily Rate + Hourly Rate * Number of Hours

Represent the number of hours with x

So, we have:

For Acme:

$C(x) = 118 + 11 * x$

$C(x) = 118 + 11 x$

For Bell:

$C(x) = 128 + 9 * x$

$C(x) = 128 + 9 x$

8 0

3 years ago