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3 years ago

Determine if the following open sentence is true

Mathematics

1 answer:

ikadub [295]3 years ago

8 0

23=.25(100)-3
23=25-3
23≠22
The equation is not correct therefore, it is false

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A hemispherical dome of a building needs to be painted. If the circumference of the base of the

soldier1979 [14.2K]

Answer:

The cost of painting the hemispherical dome is 110880 unit

Step-by-step explanation:

Given as for a hemispherical dome :

The circumference of base = 17.6 m

The cost of painting it = 5 unit per 100 cm²

∵ circumference of base = circumference of circle = 2× $\pi$ ×radius

So ,17.6 m = 2× $\pi$ ×radius

Or, Radius = $\frac{17.6\times 7}{2\times 22}$

Or, Radius = $\frac{123.2}{44}$ = 2.8 m

Or, R = 280 cm

So, Total surface area of hemispherical dome = 3× $\pi$ ×radius²

or, Total surface area of hemispherical dome = 3× $\pi$ ×280²

Or, Total surface area of hemispherical dome = $\frac{3\times 22\times 280\times 280}{7}$

Or, Total surface area of hemispherical dome = $\frac{5174400}{7}$

∴ Total surface area of hemispherical dome = 739200 cm²

Now, The cost of painting 100 cm² is 15 unit

So, The cost of painting 739200 cm² = $\frac{15\times 739200}{100}$

Or, The cost of painting 739200 cm² = 110880 unit

Hence The cost of painting the hemispherical dome is 110880 unit Answer

7 0

3 years ago

Jodie ran at an average speed of 10 km/h for 15 minutes.<br> How far did she run in km?

laiz [17]

Answer:

2.5 km

Step-by-step explanation:

15 minutes is

15 minutes * 1 hour/ 60 minutes = 1/4 hour

15 minutes = 1/4 of an hour

10 km/ hour * 1/4 hour = 10/4 km = 2.5 km

5 0

3 years ago

Read 2 more answers

12 points help fast I need help

dimaraw [331]

Answer:

False, False, True, True

Step-by-step explanation:

IQR's
Ride A: 30 - 20 = 10
Ride B: 30 - 10 = 20
False, as 10 < 20

Medians
Ride A: 25
Ride B: 20
False, as 25 > 20

Ranges
Ride A: 45 - 5 = 40
Ride B: 35 - 0 = 35
TRUE, as 40 > 35

Minimum
Ride A: 5
Ride B: 0
TRUE, as 0 < 5

4 0

3 years ago

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The grocery store carries diapers for children. Each diaper container has 48 diapers. Two dozen babies each need a container of

charle [14.2K]

Answer:

1152 diapers are needed

Step-by-step explanation:

2 dozen babies is equall to 24 babies

-(1 dozen is 12 babies)

If 24 babies need a package of diapers which includes 48 diapers, we need to multiply 24x48 which equals 1152 diapers

7 0

3 years ago

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In the equation below a is a number between 0 and 1 8 x a = b which statement about the value of b is always true

Kamila [148]

Answer:

See Explanation

Step-by-step explanation:

Given

$0 \le a \le 1$

$8*a =b$

Required

Determine the true statement about b

The question is incomplete as options are not given. However, a general explanation is as follows:

Rewrite $8*a =b$

$b = 8 * a$

When a = 0

$b = 8 * 0 = 0$

When a = 1

$b = 8 * 1 = 8$

This means that:

For $0 \le a \le 1$

Then $0 \le b \le 8$

<em>This means that: b is a number between 0 and 8</em>

3 0

3 years ago