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2 years ago

Find the area of these shapes:

Mathematics

2 answers:

Phantasy [73]2 years ago

7 0

Answer:

4. 25.12 cm²

5. 28.56 cm² (square = 16 cm²) (semi-circle = 12.56 cm²)

Step-by-step explanation:

vazorg [7]2 years ago

6 0

4. pi*4^2= 50.265
50.265/2=25.133

5. 4^2=16
pi*2^2=12.566
12.566/2=6.283
16+6.283=22.283

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Hurry please!!! Fast response

AlladinOne [14]

Answer:

$SA= \frac{2}{3} \pi rl+16 \pi r^2$

Step-by-step explanation:

Surface area of the original cone

$SA= \pi r l + \pi r^2... (1)$

When, radius is quadrupled and slant height is reduced to one sixth

$i. e. \: \:r = 4r\: \: \&\:\: l= \frac{1}{6}l$

Plug the above values of r and $l$ in equation (1), new surface area becomes:

$SA= \pi (4r)\times \frac{1}{6} l+ \pi (4r)^2$

$SA= \frac{4}{6} \pi rl+16 \pi r^2$

$\huge \purple {\boxed {SA= \frac{2}{3} \pi rl+16 \pi r^2}}$

8 0

2 years ago

emilio build and sells homemade wooden toy for $12 each the festival he is attending charges $50 to set up his Booth how much mo

Salsk061 [2.6K]

Emilio will earn $334.

12*32=384 --> amount of money he earns from selling

384-50 --> subtract the amount the festival charges

=334 --> final profit

<u>Please mark this answer as the Brainliest if it helped! Thank you.</u>

3 0

2 years ago

Read 2 more answers

The percent frequency distributions of job satisfaction scores for a sample of information systems (IS) senior executives and mi

Lesechka [4]

Answer:

c. 0.83

d. 0.28

Step-by-step explanation:

See solution below

8 0

3 years ago

Anna selects a positive multiple of 4 that is less than forty, and Becky selects a positive multiple of 3 that is less than sixt

Luba_88 [7]

Answer:

3/171

Step-by-step explanation:

The problem can be simplified into finding probability that Anna and Becky select 12 or 24 or 36 which are less than 40 and multiples of 3 and 4.

Probability of Anna selecting 12 = 1/9

Probability of Becky selecting 12 = 1/19

Probability of Anna and Becky selecting 12 = 1/9 * 1/19 = 1/171

Probability of Anna and Becky selecting 12 or 24 or 36 = 3* 1/171 = 3/171

4 0

2 years ago

1. Dole Pineapple Inc. is concerned that the 16-ounce can of sliced pineapple is being overfilled. Assume the standard deviation

Anna71 [15]

Answer:

Claim : The mean weight is greater than 16 ounces

$H_0:\mu = 16 \\H_a:\mu >16$

x = 16.05

n = 50

$\sigma = 0.03$

Since n > 30 and population standard deviation is given

So, we will use z test

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

Substitute the values

$z=\frac{16.05-16}{\frac{0.03}{\sqrt{50}}}$

$z=11.7851$

Critical value at 0.05 significance level is 1.645

z statistic > critical value

So, we reject the null hypothesis

So, we can conclude that the mean weight is greater than 16 ounces .

6 0

2 years ago