4 years ago

What is the length of r?

Mathematics

1 answer:

muminat4 years ago

5 0

I don't understand your question. can you make it clear

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If the rectangular menu is 3 feet long by 2 feet wide , what is the area of the menu?

Bess [88]

area = length * width

= 3 * 2

= 6 ft ^2

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3 years ago

Find the quotient and remainder when 5x4-3x2+2x-4 is divided by x-3

blagie [28]

Step-by-step explanation:

5x4-3x2+2x-4/x-3

=2x+5×4-3×2-4/x-3

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3 years ago

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3 years ago

Find the value of the lesser root of x2 - 6x + 8 = 0.

Ulleksa [173]

Answer:

Step-by-step explanation:

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3 years ago

A researcher is planning to compare the effects of two different types of lights on the growth of bean plants. She expects that

kicyunya [14]

Answer:

The sample size is $n = 36$

Step-by-step explanation:

From the question we are told that

The sample standard deviation is $s = 1.5$

The mean difference of the two groups is $\=x _ 1 - \=x_2 = 1$

The standard error is $SE = \frac{ \= x_1 - \= x_2}{4}$

=> $SE = \frac{1}{4}$

Let assume that the confidence level is 95% hence the level of significance is

$\alpha = (100-95)\%$

=> $\alpha = 0.05$

So the critical value of $\frac{\alpha }{2}$ obtained from the normal distribution table is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically evaluated as

$E = Z_{\frac{\alpha }{2} } * SE$

$E = 1.96 * \frac{1}{4}$

$E = 0.49$

Generally the sample size is mathematically represented as

$n =[ \frac{Z_{\frac{\alpha }{2} * s^2}}{E}]^2$

=> $n = [\frac{1.96 * 1.5}{0.49} ]^2$

=> $n = 36$

6 0

4 years ago