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SVETLANKA909090 [29]
2 years ago
8

Find the area of a rectangle with a length of 7 centimeters and a width of 24 centimeters.

Mathematics
1 answer:
nadezda [96]2 years ago
4 0

Answer:

168 cm^2

Step-by-step explanation:

Given,

Length ( l ) = 7 cm

Width / breadth ( b ) = 24 cm

To find : -

Area of rectangle = ?

Formula : -

Area of rectangle = l x b

Area of rectangle

= 7 x 24

= 168 cm^2

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Step-by-step explanation:

\to \sf \: \: 250\% \: of \: 4.4  \\  \sf \to \frac{250}{100}  \times  \frac{44}{100}  \\   \sf \to \:  \frac{11 \cancel{000}}{10 \cancel{000}}  \\  \sf \to \:  \frac{11}{10}  \\  \sf \to \: 1.1 \: ans.

8 0
3 years ago
The calibration of a scale is to be checked by weighing a 13 kg test specimen 25 times. Suppose that the results of different we
Natali5045456 [20]

Solution :

a).

Given : Number of times, n = 25

            Sigma, σ = 0.200 kg

            Weight, μ = 13 kg

Therefore the hypothesis should be tested are :

$H_0 : \mu = 13 $

$H_a : \mu \neq 13$

b). When the value of $\overline x = 12.84$

 Test statics :

   $Z=\frac{(\overline x - \mu)}{\frac{\sigma}{\sqrt n}} $

  $Z=\frac{(14.82-13)}{\frac{0.2}{\sqrt {25}}} $

          $=\frac{1.82}{0.04}$

          = 45.5  

P-value = 2 x P(Z > 45.5)

            = 2 x 1 -P (Z < 45.5) = 0

Reject the null hypothesis if P value  < α = 0.01 level of significance.

So reject the null hypothesis.

Therefore, we conclude that the true mean measured weight differs from 13 kg.

3 0
3 years ago
Determine which functions have two real number zeros by calculating the discriminant, b2 - 4ac. Check all that
Nuetrik [128]
Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.
8 0
3 years ago
Read 2 more answers
Figure this out please
rusak2 [61]

Answer:

570 cm³

Step-by-step explanation:

Check the rule in your picture about Calculating the volume of a prism:

Volume = (2×15)×19

             = 570

7 0
3 years ago
Read 2 more answers
A.1<br><br> B. 3<br><br> C. 4<br><br> D. 5<br><br> Note: l want answer true...please......;)
Ainat [17]
Hiya.
It would require 4 blocks, so it’s would be C.
5 0
3 years ago
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