3 years ago

Find the area of a circle

Mathematics

1 answer:

Veronika [31]3 years ago

8 0

Hello from MrBillDoesMath!

Answer:

16Pi

Discussion:

Area of a circle of radius "r" is given by the formula

A = Pi * r^2.

In our case this becomes,

A = Pi * (4^2) = Pi * 16 = 50.3 (approximately)

Thank you,

MrB

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siniylev [52]

Answer:

Slant height (s)= 12.1 cm

Step-by-step explanation:

Given: Base= 4.5 cm.

Surface area of right square pyramid= 129.5 cm.

First, calculating slant height (s) of right square pyramid.

Surface area of square pyramid= $(a^{2} +2\times a\times s)$

a= side of square base.

s= slant height

∴ $129.5= (4.5^{2} + 2\times 4.5\times s)$

⇒ $129.5= (20.25+2\times 4.5\times s)$

⇒ $129.5= (20.25+9\times s)$

Now, opening the parenthesis and subtracting both side by 20.25.

⇒ $109.25=9\times s$

cross multiplying both side

∴ Slant height (s)= 12.1

5 0

4 years ago

Daniel is completing a home project. He needs 13 pieces of wood, each 112 feet long, to complete the project. How much wood does

snow_lady [41]

13 x 112 = 1456 ft

112 ft x 8 = 896

Only needs 8 pieces

4 0

3 years ago

Round 89,891 to the nearest ten-thousands place.

frez [133]

The ten thousands digit is the 8 to the left edge.

You need to increase this digit because the thousands digit is greater than zero.

The answer is 90,000.

6 0

3 years ago

How many hours are in 17 years? Write your answer in scientific notations with 3 sig figs.

taurus [48]

Answer:

1.49 x $10^{5}$ hours

Step-by-step explanation:

1 day=24hours

1 year=365 days

365days=24 x 365=8760hours

17 years

= 8760hours x 17

=148920hours

=1.4892 x $10^{5}$

= 1.49 x $10^{5}$ hours

6 0

3 years ago

Read 2 more answers

A family of four went to a theme park and spent a total of $480 on tickets, food, and souvenirs. ⅙ of their money spent was for

dmitriy555 [2]

Answer:

$70

Step-by-step explanation:

1 - ⅙ - ¼ = (12 - 2 - 3)/12 = 7/12

7/12 × 480 = 280

280/4 = 70

3 0

3 years ago