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3 years ago

What is the area of a rectangular playground with a length of 24 feet and a width of 18 feet?

Mathematics

2 answers:

vazorg [7]3 years ago

7 0

Answer:

area of a rectangular field = 432feet²

Step-by-step explanation:

area of a rectangular field = ?

length of the rectangular field = 24feet

width of the rectangular field = 18feet

recall that, the formulae for finding the area of a rectangle

=width x length

area of a rectangular field = 24feet x 18feet

area of a rectangular field = 432feet²

therefore the area of a rectangular playgroud whose length is 24 feet and

18width is evaluated to be 432feet²

maw [93]3 years ago

6 0

Answer: 432

Step-by-step explanation:

Multiply your length times your width to get the area.

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3 years ago

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2 years ago

A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of 178 students

xxTIMURxx [149]

Answer:

critical value = 1.645

The 90% confidence interval = ( -22.62, -17.58)

Step-by-step explanation:

Given that:

the sample size $n_1$ = 178

the sample size $n_2$ = 226

the sample mean $\overline x_1$ = 54.4

the sample mean $\overline x_2$ = 74.5

population standard deviation $\sigma_1$ = 18.58

population standard deviation $\sigma_2$ = 9.52

level of significance ∝ = 1 - 0.90 = 0.10

The critical value for $Z_{\alpha/2} = Z _{0.10/2} = Z_{0.005}$ is 1.645

For the construction of our confidence interval, we use 90% since that is used to find the critical value.

∴

The margin of error = $Z \times\sqrt{\dfrac{\sigma_1^2}{n_1} + \dfrac{\sigma_2^2}{n_2}}$

$1.645 \times\sqrt{\dfrac{18.58^2}{178} + \dfrac{9.52^2}{226}}$

$1.645 \times\sqrt{\dfrac{345.2164}{178} + \dfrac{90.6304}{226}}$

$1.645 \times\sqrt{2.34042}$

$\simeq$ 2.52

The lower limit = $( \overline x_1 - \overline x_2) - (M.O.E)$

= ( 54.4-74.5) - (2.52)

= -20.1 - 2.52

= -22.62

The upper limit = $( \overline x_1 - \overline x_2) + (M.O.E)$

= ( 54.4-74.5) + (2.52)

= -20.1 + 2.52

= -17.58

The 90% confidence interval = ( -22.62, -17.58)

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2 years ago